Shacey Petrovic - Insulet Corp.
Management
Okay. So I would say we're really seeing very little impact. There's, of course, noise in the marketplace and customers are doing their research. But I think where we benefited that it's not the same target segment. 670 is very much focused on patients who are willing to wear a tubed pump, well controlled adults who are willing to put the work into get the incremental improvement with that system. And our target patient population, as we've talked about, I think, for many quarters now, is the multiple daily injection user and so we're targeted towards different segments. The other thing I would say is that, as you know, I'm sure, 670 is not approved for people 14 and younger. And it's actually black box in seven and younger. So the pediatric patient population, which is our fastest-growing segment, is not really eligible or appropriate for this technology. And as we get closer to this actually becoming available on the market, I actually would say that in that instance when people start to learn more about the technology, we're probably going to feel this a little bit less in the marketplace. But we are very confident in our growth and our opportunity and feeling good about the finish for this year and 2017.
David Ryan Lewis - Morgan Stanley & Co. LLC: Okay. Very helpful. And then, Mike, I guess I should ask you how it feels to make some money, but I'll ask a serious question. Margins have been, obviously, the investor surprise this year and gross margins, obviously, have been heading higher (29:38). But you've been driving dramatic leverage, right. I think this is the fourth straight quarter where operating expenses continue to fall. So, it sounds like based on your commentary, looking forward I think at some point we have to expect that operating expense growth to tick back up. Is that sort of a same assumption from these depressed levels? And then in terms of gross margins, I'm expecting ratable improvements from here into 2017 and beyond, but obviously not the step function we saw here in 2016. Thanks so much.