Ladies and gentlemen, thank you for standing by. Welcome to the Align Technology Fourth Quarter and Fiscal Year Ended 2013 Financial Results Conference. [Operator Instructions] As a reminder, this conference is being recorded. It is now my pleasure to introduce Shirley Stacy of Align Technology. Ms. Stacy, you may begin.

Good afternoon, and thank you for joining us. I'm Shirley Stacy, Vice President of Corporate Communications and Investor Relations. Joining me today for the call is Tom Prescott, President and CEO; and David White, CFO. We issued fourth quarter and fiscal year 2013 financial results today via Marketwire, which is available on our website at investor.aligntech.com. Today's conference call is being audio webcast and will be archived on our website for approximately 12 months. A telephone replay will be available today by approximately 5:30 p.m., Eastern time, through 5:30 p.m. Eastern time on February 7. To access the telephone replay, domestic callers should dial (877) 660-6853 with conference number 13573937, followed by #. International callers should dial (201) 612-7415 with the same conference number. As a reminder, the information that the presenters discuss today will include forward-looking statements, including, without limitation, statements about Align's future events, product outlook and the expected financial results for the first quarter and fiscal year 2014. These forward-looking statements are only predictions and involve risks and uncertainties such that actual results may vary significantly. These and other risks are set forth in more detail in Form 10-K for the fiscal year ended December 31, 2012. These forward-looking statements reflect beliefs, estimates and predictions as of today, and Align expressly assumes no obligation to update any such forward-looking statements. During today's conference call, we will provide listeners with several financial metrics determined on a non-GAAP basis to aid comparisons between our current and historical financial results. These items, together with the corresponding GAAP numbers and the reconciliations to the comparable GAAP financial measures, are contained in today's financial results press release, which we have posted on our website under Financial Releases and have been furnished to the SEC on Form 8-K. We encourage listeners to review these items. We've also posted a set of GAAP and non-GAAP historical financial statements, including the corresponding reconciliations, and our fourth quarter conference call slides on our website under Quarterly Results. Please refer to these files for more detailed information. With that, I'll turn the call over to Align Technology's President and CEO, Tom Prescott. Tom?

Thanks, Shirley. Good afternoon, everyone, and thank you all for joining us. On the call today, I'll provide some highlights from our fourth quarter and briefly discuss the performance of our 2 operating segments, Invisalign clear aligners, or our aligner segment, and iTero Scanner and CAD/CAM services, our scanner segment, including some color on our orthodontist and GP Dentist customers as well as our geographies around the world. David will then share more detail on our fourth quarter and full year financials and discuss our outlook for the first quarter and broader view into how we see 2014 shaping up. I'll then come back and summarize a few key points and open the call up to your questions. The fourth quarter was a solid finish to the year for Align, and we're pleased to have delivered better-than-expected revenue, operating margins and earnings, driven by strong Invisalign growth from our international doctors in Europe and Asia Pacific. North American Invisalign case shipments were sequentially flat. However, Invisalign case receipts were softer than expected in December as many orthodontists and GP Dentist practices had fewer days in office due to the timing of the 4 major holidays between Thanksgiving and New Year's Day. However, January receipts are improving, and it appears that doctors and their patients are getting back to business. Overall, 2013 was a very good year, and our strong performance reflects continued progress and execution of our strategic growth drivers. Broadly stated, they are: market expansion, doctor preference and brand strength. I'll touch on each of these very briefly. First, market expansion. Over the past year, we have continued expanding in our existing markets through targeted investments as well as opening up new geographies and markets. For example, in North America, in Europe, in China and Japan, where we have…

Thanks, Tom. Before I get into the details, I'd like to note that unless stated otherwise, all of the financial information I'll discuss will be presented on a GAAP basis. With that, let's review our fourth quarter and 2013 financial results. As Tom mentioned, our revenue for the fourth quarter was a record $178.3 million, up 24.8% from the corresponding quarter 1 year ago and up 8.4% from the prior quarter. Fourth quarter clear aligner revenue was $166.2 million, was up 25.1% year-over-year and was up 8.3% sequentially. Our year-over-year growth reflected higher Invisalign volumes from our orthodontists and GP Dentists, as well as higher international ASPs. Sequential growth -- revenue growth was primarily driven by higher case volume from our international geographies, which also had the effect of increasing our overall ASPs as a result of higher pricing internationally. We also had a $1.3 million benefit from foreign exchange rates. For the fourth quarter, total Invisalign shipments increased to 111,100 cases. Year-over-year growth of 22.8% was driven by both customer-base expansion as well as increased utilization. We continued to expand our base of Invisalign providers through clinical education and training. And in Q4, we added 105 new North American orthodontists, 1,355 new North America GP Dentists and 1,060 new international doctors for a total of 2,520 new Invisalign doctors. Total Invisalign utilization for Q4 was 4.4 cases per doctor, a year-over-year increase from 4.1 cases per doctor and up slightly from 4.3 cases in Q3. Improvements in product and technology over the past few years, including G4 and SmartTrack aligner material, continues to strengthen our doctors' clinical confidence in the use of Invisalign such that they now utilize Invisalign more often and on more complex cases. Fourth quarter revenue for our scanner segment increased to $12.1 million. This represented…

Thanks, David. As we've described, 2013 was a terrific year for Invisalign customers, their patients, our shareholders and the entire Align Technology team. We believe sustained focus on the right value drivers will continue these positive trends and can move us closer to our long-term goal of having clear aligner therapy someday become the standard of care in orthodontics. On the scanner side of the business, we continue to build a strong installed base and are increasingly leveraging that customer base to the benefit of Invisalign treatment and better restorative dentistry. Through the right investments, we expect to continue our strong growth rates, multiples among market growth -- multiples above market growth rates in virtually every geography. Even as we manage through the many attractive ROI investment choices across the business, we will continue to seek operating leverage in the business. While December and early January receipts were slower than expected in North America, we fully expect to revert to the type of growth expected and in the direction of what we're seeing in our other reasons around the world. The fact remains that we have tremendous headroom for growth in every market area, which reinforces why we keep investing in the right value drivers. Over the past few weeks, we kicked off our 2014 fiscal year around the world with sales meetings in North America, in Asia and in Europe. At every meeting, we reinforced our vision for long-term market leadership, ensured that each team was aligned with our 2014 and long-term goals and shared our collective passion for innovation, which drives this company to be different than everyone else in our industry. I'm very excited about what I believe will be a terrific year and look forward to spending time with you at industry events like Chicago Midwinter in February, along with other investor conferences, so we can discuss our plans and progress further. And with that, let's go back to the operator for some questions. Operator?

[Operator Instructions] Our first question is from Jeremy Feffer of Cantor Fitzgerald. Jeremy Feffer - Cantor Fitzgerald & Co., Research Division: I wanted to start first on pricing. Obviously, you guys had a tremendous trend or performance in o U.S. But I just want to get some more color on what was going on in the U.S., particularly with the GP Dentists.

David, do you want to take that one?

Sorry, [indiscernible].

GP Dentists pricing? Well, I guess in general, we saw lower activity with GPs in general, didn't get quite the growth we would have expected. Concurrently, we saw better growth out of orthos. Maybe saying it differently, less of a downturn than normal. So that GP volume, much of that was among, I'd say, lower to middle volume users, and more of them paid full price versus advantage based. That -- pretty simple. The second part is probably more of a migration towards Invisalign Express 10 from 5 and more full cases. All of those things play together for that higher ASP in North America. Jeremy Feffer - Cantor Fitzgerald & Co., Research Division: Okay. And then sticking with the GP Dentists, you had the -- I think the highest number of shipments to dentists and you train the most number of dentists. What are you seeing, I guess, going forward as, I guess, as patient visits start to stabilize and improve a little bit, getting their utilization numbers up. Are you seeing maybe from the new 3M scanner and some from -- from some of these other initiatives? Do you see their utilization starting to pick up going forward?

No, I think, Jeremy, that this is one of the puzzles we've got to solve over time. In my comments, I talked about the new Invisalign Fundamentals training program. We're hopeful that, that's going to help. It -- fitting Invisalign or orthodontic practice into a busy general dentist office is very different from most of their other sort of procedures. And so we want them to choose the right case and treat those cases really, really well and sometimes, for an adult, include some restorative with that. Oftentimes adults need some of that. So it can be a great fit. It's not for every practice, and orthodontics is complex. With all that said, the Invisalign Fundamentals, we're -- out of 3 pilots we put on, we're very pleased to see kind of post-90 days much better than what we've seen in the past with our own CE1. So with that, going forward, we'd be hopefully better able to engage the right practices, get share of mind and have them get great success for the patients and their practice. But this is a long-term journey, and we have to balance this. We're always focused on the specialty of orthodontics, but many adults seek their general dentist out for orthodontic advice and for treatment. So we want to be in both places. Jeremy Feffer - Cantor Fitzgerald & Co., Research Division: Okay. And just going to squeeze one more quickly and then I'll jump back in queue. Any -- can you comment at all in any possible negotiations going on with other scanner manufacturers?

We only announce R&D and pipeline when it's finished. And what we've said, we've tried to be very clear that our intent is to work with appropriate other players with the right kind of scanners that we could qualify. But it's an extensive process, and it takes time. When there's news, you'll hear it.

The next question is from Brandon Couillard of Jefferies.

Tom, would you elaborate on your efforts to target those legacy ortho users that you haven't seen as customers in recent years? And any chance you could quantify the percentage of the overall orthodontic market that, that customer base would comprise?

Well, I think when you could -- you could back into it with the numbers we provide a little bit. And each year in North America, for example, we slightly grow the base of orthodontists. I think we haven't put out, I guess, final numbers yet. It probably would be in our K or something with the number of orthodontists we did business with in North America. We're still counting all that up. But that number's grown, not hugely but nicely each year, and that's a direct reflection of this reengagement. We're really not training that many new orthodontists. We're maybe retraining or bringing them back in and sometimes in university settings, other times in other settings. But in many cases, early orthodontists with Invisalign didn't find us ready for prime time, and I'd have to argue they were probably right. As the product has dramatically evolved, as our capabilities have grown, they're able to feel increasingly that they don't always make clinical any trade-offs, even treating harder cases. And as they see their colleagues getting great clinical results and practice success, it tends to draw them back to us. It is a slow, steady process, and we're happy to see it just in the right direction. But I -- there's nothing more quantitative I could provide there.

And then just on the ITC case, can you just give us an update on your view of how that's progressing and the general issues that they've opened up to public comment now and how significant they might or might not be?

As part of our normal practice, I've actually got Roger George, our General Counsel, in here. So I'd like to ask Roger to take that question, please.

So we really can't -- we really don't know much more than what the ITC has done. They posted on their website exactly what the public has seen, and it's what we've seen. We've had no other communication from them. We have no sense from anyone internally at the ITC, on the ITC staff, why they've asked for the additional commentary. And so we're basically waiting to find out ourselves.

The next question is from Joe Block of Stifel. Jonathan D. Block - Stifel, Nicolaus & Co., Inc., Research Division: I just changed my name, I guess. But...

Jon.

Yes, we'll take a call from Jon Block, I think. All right. Jonathan D. Block - Stifel, Nicolaus & Co., Inc., Research Division: I hate number one here [ph], but I just need some clarity. So you beat numbers handily for the quarter on the bottom line by whatever it is, $0.08 or $0.09, but you called out a weak December. And so can you help me with that, Tom or David? In other words, the way you guys recognize revenue, did your weak December in terms of receipts, is that reflected in January sales? Or was your weak December sort of reflected in your 4Q numbers, if that makes sense?

Jon, this is David. I'll see if I can field that. So it actually depends upon exactly when a doctor approves a ClinCheck treatment plan. If that happens early enough in the month of December, then we typically can turn that shipment around and we'll take revenue for it in the quarter. To the extent it happens late in the quarter, it may be difficult for us to turn that around and actually deliver it to the doctor by that time period. The impact that has potentially in terms of a weak December has on our business is obviously we see some revenue fall-off possibly in December, but it also means a slower amount of, you might call it, backlog of cases that we're starting January with. And so that, coupled with the fact that January started off a little bit slow as well, those 2 kind of inform, you might say, our guidance as to why we're guiding where we are for Q1. Jonathan D. Block - Stifel, Nicolaus & Co., Inc., Research Division: Okay, understood. And I don't want to put words in your mouth, but it seems like it's safe to say that the weak December weighed on 1Q guide a little bit, right? Some -- again, some was in December but some slipped into January, correct?

Certainly it has some bearing in how we look forward, correct. Jonathan D. Block - Stifel, Nicolaus & Co., Inc., Research Division: Okay, okay. And then more importantly long term, and there's a lot that I'd love to touch on, but I'll sort of cherrypick. You've obviously spent a lot of time talking about gross margin and how that might vary by product line. But can you give us a big picture? With international stepping up the growth rate meaningfully and, I guess, some of the investments that you put to work years ago that are clearly starting to pay off, how does the gross margin big picture internationally compare to that of the U.S.?

So just continuing on. So if you look at our gross margins, they're influenced by a number of things. Certainly, manufacturing costs would be one. The cost of fulfilling a case for a U.S. patient versus the cost of fulfilling a case for a European patient is not significantly different, although their cases tend to be a little bit more complex. So where you see it primarily is in the -- in ASP. If you look at our pricing in Europe and so forth, it's typically higher than what we experienced in terms of how we price here in the U.S. And most of the business that they do there is through orthodontics offices. So they -- so the -- so as our mix of international business continues to increase, it has the effect of lifting up our gross margins. It also has the effect of increasing our ASPs. And so that's what we've kind of experienced over the last year, and that's what we continue to expect over the years ahead. If you look at, for example, at the amount of international business we did last year versus 2013, it's gone up about 5 points out of our total mix year-over-year. And so we think that's going to continue -- Europe and Asia Pac continue to be our high-growth areas. And as they grow, we expect to see better gross margins, we expect to see better ASP lift. Jonathan D. Block - Stifel, Nicolaus & Co., Inc., Research Division: One more if I can just slip it in before Shirley cuts me off. Tom, you mentioned the -- also buying back some or calling on some distributors, the remaining EMEA. These are markets adjacent to what you currently got. How does that weigh on the P&L? Obviously, the big APAC was dilutive for 6 or 9 months and then quickly reversed. How should we think about near-term dilution, long-term accretion with what you're doing with the remaining countries?

Thanks, John. The reason we position it as different was exactly for that reason. In many ways, it's different because it's not a large stream of revenue today. It's also different because we don't pick up substantial headcount or costs. We will incrementally invest, leveraging our country leadership and sales structure in those adjacent countries, putting incremental headcount into these specific new countries, and then starting to train more doctors. It's not a large business in any case today. And so, number one, you won't see any significant revenue lift like we did in Asia Pacific. Number two, there isn't a concomitant OpEx offset to go either. So both of those are the reason why we said it wouldn't be material in the near term.

The next question is from Chris Lewis of Roth Capital Partners.

First, I just wanted to start on pricing. Obviously a pretty nice bump there in international ASPs. I was hoping you could just talk a bit more on what led to that increase there sequentially. And how should we expect international ASPs to trend looking out into 2014?

So Chris, I'll see if I can expand on what I just stated for Jon's question. Our -- if you look at quarter-over-quarter, our international business was up very nicely, whereas North America was not so. And as I indicated in the prior question, our ASPs in Europe and international and Asia Pac region are -- or tend to be higher, more than 10% higher than what our pricing here is in the U.S. And so as their business continues to grow and outpace, you might say, the growth we're -- we continue to see in North America, they become a larger piece of our total overall mix. And as that mix increases, that -- we tend to get ASP uplift from that. And we would expect that to continue as long as they continue to grow at rates faster than what we see in North America.

Okay, great. And then just on the guidance, you guided to a 20.5 % operating margin in the first quarter. That's after nearly putting up a 30% operating margin this quarter. I do understand there are some onetime benefits here, and December softness impacts that a bit. But first quarter implied revenues are basically flat sequentially. So can you just walk me through the reasons for that expected dip in operating margin in the first quarter from these 4Q levels and possibly expand on some of those follow-on investments that you mentioned?

You bet, Chris. So first of all, I think you have to look at Q4, and you have to recognize that there are a couple of nonrecurring items in there, both of which I spoke to a few minutes ago in our pre-rehearsed script. One of those is the fact we had about $2.5 million of onetime items in our cost of sales that we don't expect to recur. They contributed about 1.5 points of gross margin in the quarter. We also had about $2.5 million of stock-based compensation that reversed. So there's a $5 million part of the bridge, you might say, from Q4 to, let's say, midpoint of our Q1 guidance. The rest of it is primarily in operating expenses, and it comes from the standpoint that, as I mentioned, our entire company runs on what we call a focal process review, where employees' compensation plans, and that includes stock awards and so forth, are reviewed annually in the first quarter and are granted in the first quarter. And so our operating expenses are going to be up. Roughly, if you take out the nonrecurring SBC, I think everything else is up about $10 million. Merit increases are going to be something on the order of about -- well, merit increases, something on the order of about $3.5 million or so. We have new grants of stock awards. That's like another couple of million dollars. We have payroll taxes. That's like another million dollars. We have a number of investments that we're making in both consumer marketing as well as market expansion, particularly internationally, and that pretty much makes up the balance. And so that's what kind of informs the guidance we gave for Q1. When you look at that going forward, I think the best thing I can point you to is the comments I made as it relates to our business model and how we see 2014 shaping up against that. We think that we delivered great results in 2013. We'd be very proud to put up the same numbers in 2014. And that's kind of where we're seeing things at, at this point.

Chris, I'll pile on for just a second. This is Tom. The specifics beyond the kind of, I'll call it, more seasonal, the lumpy spending around beginning the new year and all those things that were just described is we are accelerating some investments in geographies. We've seen good results from that so far, and that shows up in the top line and drops through. We are accelerating some investments, not huge, but they add up to be meaningful in consumer marketing. And we're expanding areas in the world where we're doing some consumer marketing and with greater affect. We are -- we just rolled out G5 deep bite. In effect, we also said we just finally launched in November SmartTrack in China based on regulatories. And so you ought to think of each of these releases as having a first blast and then a series of echoes in terms of the whole commercialization cycle. There are still doctors we're reaching that are slower adopters that we're still pushing through to get them to try and recognize the differences in SmartTrack, so that's kind office by office process, that we keep putting our shoulder behind that. That goes on all around the world. And so a new release, in this case deep bite, will go on for 1 year or more. And then finally, in terms of R&D, we accelerate some of our investments in terms of expanding new indications so we can take on even more complex cases and close the gap with brackets and wires. So I think where the spending shows up especially is in a Q1, and the operating margin shows up a bit more this quarter given it's a little softer start to the year. It's just as simple as that.

The next question is from Steve Beuchaw of Morgan Stanley.

I wondered, David, if you could maybe give us a retrospective on what's happened over the course of the year in the international business. And I ask because if I look at what has happened, the growth sequentially over the course of the year is really extraordinary. And so I wonder if you could just put some numbers to it. Like how much of that in total would you say is ASP? How much of that would you say is new users? How much of that is currency? Could you help us walk through that?

Well, Steve, I don't think I can quantify how much of those are new users, you might say, or new doctors. Our growth has been attributable to existing doctors as well as bringing new doctors online and nurturing those doctors through their training and bringing them up down the learning curve to incorporate the product into their practice. Clearly, we're seeing greater growth in Asia Pac than what we're seeing in Europe or North America. We -- if you look at the growth rates in both of those 2 countries on a case-volume basis, they're far outstripping what we see elsewhere in the world. We're making -- we're continuing to make investments in them over the course of 2014, and we expect them to continue growing at the rates that we've seen historically. I'm not sure I can break it down really for you much really finer than that. Hopefully, that suffices.

I appreciate it, David. So I have a question for Tom as well, and I will not ask for quantification on this one. I wondered, Tom, if you can help us think about the other side of the coin when it comes to alliances with other players in the industry on scanners. Clearly, there's an important clinical and engineering question there. Is it the right scanner? Does it do what you need it to do? But there's also the business side of it. What are the right things to think about in terms of the economics, the arrangements that we should consider as we think about the longer term when some of these alliances might be a more significant part of the business?

Sure. Certainly I won't be quantifying this. The simple fact is that we've followed what the Cadent business, the iTero business, what their ethos was, which was to be very open. The iTero scanner is the most open scanner in the dental industry. They work with any lab, any supplier, any partner. And the goal is to have maximum utility for the customer and make the best customer experience for the patient. We have to be a little more discriminating than that when it comes to the Invisalign process because we have a very, very finely tuned mass customization process running at large scale. So we tend to treat this first as, in effect, a release of new manufacturing technology, validate, qualify and then very carefully bring online. The last question you raised here is about who do we want to work with or not. I think we're -- we start not by asking it that way. We say what's best for our customers and how do we help them. If they already have another scanner, and there are a significant number of those out there, and they would like to do Invisalign, we would not want them to have go buy another scanner, whether it's an iTero or somebody else's. So we're kind of trying to follow what's best for the customer here. And there's a handful of good companies and great scanners out there that over time perhaps will also have interoperability. And it's -- I hate to say it's that simple, but it kind of is. It just -- it's a difficult process, and we're very careful and thoughtful about the way we go through qualifying this.

The next question is from Robert Jones of Goldman Sachs.

This is Nathan Rich on for Bob. First is, I guess just to maybe take a step back, could you talk about what you're seeing from a competitive perspective? Given the strength that you've seen in ASPs and your ability to take market share, both from the U.S. and internationally, can you kind of maybe help us think about where you see opportunities to take further market share going forward?

Well, I think that, Nathan, first of all, that we -- there's nothing different, nothing unusual. There's kind of no change from 1 quarter ago or 2 quarters ago. In general, what I'd say is that our biggest competitor remains traditional brackets and wires or self-ligating brackets, but the brackets and wires manufacturers. And their game is very good. They're fighting very hard not to yield share to clear aligner treatment, and we have to go office by office and earn our stripes, which really goes to product evolution and making ourselves easier to do business with and all the like. There are -- to our knowledge, there aren't really any new per se clear aligner players popping up. I'd say there's more knock-offs around the world outside the U.S. But really, it's the same competitive dynamic. And our biggest challenge is twofold: one, taking share from those brackets and wire starts, which is -- they've been doing that for 100 years, and it's very ingrained behavior for the clinician and in many communities; secondly, in parallel with that, we believe we can grow the market, which is also what's going on, especially among adults, and we offer a fundamentally different value proposition. And those 2 things, at least to this point, certainly blunt whatever noise there is around the competitive side for us.

And then if I could just go back to the strength in ASPs for a second. I think that previously, you had expected ASPs to decline in 2014. But now that given the strength you've seen internationally, can we kind of think of this as sort of a change in trend where we might be able to see ASPs higher year-on-year in 2014?

So Nathan, I'll see if I can add a little bit to what I said previously. If you look at our Express product, which is primarily designed and targeted at adults and others who have minor malocclusion needs, treatment needs, we have historically taken the position, the belief, that, that market is perhaps the most untapped market for us because the untreated adult population is so large. It is -- and if you look at our performance over the last year, that product has done very well from a revenue standpoint. Well, from a volume standpoint, it's up over 20 points year-over-year. It's consistent with the rest of the company, actually a little bit outgrowing the pace of the company. And actually, as you look at our total product mix, it's actually picked up 2 points in total product mix across the company. And so as that continues, one would think that our ASPs would trend down -- downward as that product becomes a larger component of our total product portfolio. On the other side of that equation, however, though, is that our international business is growing at an even faster rate. And as I've mentioned a few minutes ago, it picked up 5 points of mix out of our total business. And as a result, that tends to be, at least at the present time, tends to be overweighting the downward ASP trend you might see as a result of the simpler cases. And so as long as our international business continues to grow at the rates that we're seeing and at multiples or percentages greater than what we're seeing the adult segment, then our ASPs are going to -- it's going to mitigate, you might say that, that downward trend.

The next question is from Jeff Johnson of Robert W. Baird. Jeffrey D. Johnson - Robert W. Baird & Co. Incorporated, Research Division: I'll -- David, I wondering if I could maybe follow up on that last point you were making there. I think one of the things I've been getting wrong the last quarter or 2 as I model you guys as case starts are growing x, and your revenue is growing at a couple of points above that, and that's the same thing that you guys are guiding to for the first quarter. Obviously, ASP is playing in there. Your non-case revenue up, I think, 45%, 46% this year, that's helping as well. But just how do I think of that conceptually going forward? I know you're talking about ASPs potentially being helped here in the international markets. As you lap the Asia Pac distributor takeout from last year, does that trend continue? And can those non-case revenues continue to grow at such big numbers going forward?

Well, the Asia Pac impact certainly, you might say, helped to some extent on the revenue growth that we saw year-over-year because that revenue got converted from distribution pricing to our normal pricing to doctors. But if you -- but perhaps the best proxy for how that growth is doing in Asia Pac is just simply looking at the case volume growth. And that case volume growth has been north of 20 points, which is faster than what -- certainly faster than what we're seeing in the North America and Europe base. In fact, I -- it's been a lot more than 20 points. So that is one piece of it right there. As it relates to the non-case revenue, I think that's primarily -- would really, for the most part, follow the trend line for the company and shouldn't -- I don't think there's anything fundamental that would cause the non-case revenues to grow at rates different than the rest of the company. Jeffrey D. Johnson - Robert W. Baird & Co. Incorporated, Research Division: Right. And I guess the follow-up to that would just be, as I think about my modeling and then as the street thinks about modeling you guys out over the next year or 2, would you expect revenue growth and case start growth to somewhat track closer together than it's been in the last couple of quarters? Or should revenue growth continue to outpace the case start growth?

I wish we were that good, that we're going to project the best that we can see in a variety of factors impact what goes on here. If in a given quarter we have more -- relatively more volume coming from advantage in the North America or in Europe, they pay a, relatively speaking, a lower ASP. If in a given quarter there's more Express 10 growth among GPs or orthodontists, ASP would go down a little bit. I think the -- so that's going to move around a little bit. What I would say is from our purposes, we're a little less or we're a lot less concerned on the absolute ASP as in the health of each product line in terms of contribution margin and that, that is doing the job for us. And so we start out a year, we start out a quarter with a plan kind of by geography and by type of customer and for our product, and we've never been exactly right yet. So I think as long as it's going up into the right and that the adoption continues, I will tell you in general with all the investments we've made around product and with greater efficacy with that product and being able to go after new indications, that a lot of the core adoption growth has been for the full product or for the team product with orthodontists and dentists doing more complex cases. That's a factor that people, I think, lose track of. Our average treatment is getting longer. The case complexity is getting greater. So those -- that all plays away from a minor malocclusion treatment a little bit towards full treatment. And then the second part is, it's a little less obvious, almost by definition, the cases that get treated in Europe and Asia are more complex than the average case in North America. And so as we accelerate growth there, by definition they're full, they're complex cases. And when you add generally a bit of a pricing premium, that's all virtuous. So I was going to pile on a little bit there, but I'll stop there and see if that wrestled it down. Jeffrey D. Johnson - Robert W. Baird & Co. Incorporated, Research Division: Yes, no, that helps a lot, Tom. And then my last question is just on -- you say for December was a little slower. I'm still unclear on whether January started off slower. Just when did you start to see the pickup? Can you help me titrate that a little bit, number one? And two, does the weather, the cold, the snow, everything we've seen, especially in the Midwest and the East Coast, does that have any impact at this point with the Olympics? I know in the past that has affected your marketing timing. Any impact from any of those non-kind of operational factors?

You've thrown everything but the kitchen sink in there, and I'm not going to hide behind it. I think I'll start with the basics. In our view, in talking to all of our customers, the -- first, in December, the primary effect in our minds was the kind of time compression, the same thing that impacts some retailers with the late timing of Thanksgiving and some compression. And secondly, the -- where the holidays were positioned, kind of midweek, that activity slowed down a little bit in offices, and we saw less of that going on and they wind up being fewer office days worked. I'm certain somewhere along the line the weather kicks into that and as you can see in January. The pattern was there's a normal slowdown for us as we get towards the holidays. It's fairly predictable. It happened a bit earlier, and it was a bit more persistent through December. That persisted into January. And as we said, traffic has rebounded nicely and improving, and -- but that, I think, as an earlier question pointed out, in general December receipts are January shipments in revenue, and then January receipts are February shipments in revenue. So you -- our guidance assumes slightly lower shipments, both for January and some of February, given the January turn. So with all that said, that's included in our guidance. We feel great about the business. There's a lot of good things going on, and we think we're going to have a terrific year.

Our final question comes from John Kreger of William Blair. John Kreger - William Blair & Company L.L.C., Research Division: Tom, based upon the feedback you're getting from your reps and your customers, do you have any updated views on the market, the orthodontic market, and the sort of unit volumes that orthodontists are seeing at this point?

I think we -- we're still putting it together. We typically are almost 1/4 trailing to really put all of our, I call it, external third-party and our own work together. But I think in general, with the -- there was a little more pronounced slowdown than we expected in December. And I think in general, the market was okay for orthodontics for -- in our mind, okay for North America. I think that it was spottier in Europe. In some markets, it was good. In others, it was not good. And in Asia, it's very spotty depending on which country you're talking about. But there are countries like Japan which are growing again and China which are growing rapidly for orthodontics. So in general, I don't think orthodontics is an easy market. It's certainly better than some other parts of dentistry. And for us, we've got this headroom I spoke about, and we see room for growth in every direction we look. That isn't necessarily the story for every player. But I think in general, patient traffic has been stable, offices have been okay. Our customers are very motivated: "We'd be back in the office right now," is what they're telling us. John Kreger - William Blair & Company L.L.C., Research Division: And then one last one. If you think about GP and where it will -- I'm sorry, G5 and where it will fit into your offering, are there any parts of your business in particular that you'll -- you think will benefit more the orthodontist versus the GPs or perhaps teen versus adult?

I think the first place start -- we start with all of our new evolutions. We -- a really important part of our business is with the specialists, the orthodontist. That's both true in North America, where we have a very significant GP sort of customers. And it -- and then if you get outside the U.S., most orthodontics is treated by orthodontic specialists. So G5 will immediately, in North America and Europe, legitimately give us access to up to half of the flow of incoming patients, both teens and adults. They may present -- they likely present with more malocclusion diagnosis than just deep bite, but deep bite is often an important part of that treatment. So where they -- we're a strong advocate of Invisalign and may have been comfortable using Invisalign to treat a deep bite. It was sometimes challenging to create those set of movements. With the features we've got, with the ability to both extrude and intrude at the same time in a predictable way, we get the opportunity to, with all the other things they've got to do, maybe treat a cross bite to do all that in, I say, a predictable way. So deep bite will help us for adults and teens. It'll help us with the specialists for sure around the world. And then ultimately, there's a fair number of GPs that use fixed appliances as well and treat orthodontics as well as other dental specialties. So I think as doctors get to try deep bite and to see it is a kit, it's a whole solution, they're going to find it's just a lot easier to use it. And over time, again office by office, we're going to earn the opportunity to get that next case switched from brackets to Invisalign. And it just takes time. As I said, it's office by office.

Well, thanks, everyone, for joining us today. This concludes our conference call. We look forward to seeing you at upcoming financial conferences and industry meetings. If you have any follow-up questions, please contact Investor Relations. Thanks.

Thank you. Ladies and gentlemen, this does conclude today's teleconference. You may disconnect your lines at this time, and thank you for your participation.