Thanks Dave. Slide 6 summarizes our presentation of GAAP results and non-GAAP measures. While Slide 7 provides a summary of our GAAP results. I'll focus my comments on our non-GAAP adjusted measures to provide insights into the underlying trends in our business. So please refer to today's earnings press release for a detailed description of the year-on-year changes in our first-order GAAP results. Looking at the non-GAAP measures on slide 8, you'll see the revenue increase of 9% that Dave mentioned earlier. Gross margin as a percent of revenue decreased to 75.1%. This decrease was due to the effective foreign exchange rates on international inventory sold. Excluding this FX effect, gross margin as a percent of revenue actually increased roughly 70 basis points, driven by higher realized prices and manufacturing efficiencies, partially offset by product mix. Total operating expense decreased 5% with marketing, selling and administrative expense decreasing 4% and R&D expense decreasing 6%. Total operating expenses as a percent of revenue declined by 710 basis points compared to Q1, 2017. This significant improvement reflects our continued efforts to reduce our cost structure and increase our margins, accelerated by the restructuring actions we took late last year. Other income and expense with income of $67.5 million this quarter compared to income of $78.3 million in last year's quarter. Our tax rate was 15.9 %, a decrease of 530 basis points compared with the same quarter last year, driven primarily by the impact of US tax reform. At the bottom line, net income increased 35%, while earnings per share increased slightly faster at 37% due to a reduction in shares outstanding from shares repurchase. We achieved a significant earnings growth by delivering high single digits revenue growth, while significantly reducing our operating expenses, creating positive leverage again this quarter. Slide 9 provides a reconciliation between reported and non-GAAP EPS. You'll find additional details on these adjustments on slide 20. So moving to Slide 10, let's take a look at the effective price rate and volume on revenue growth. This quarter the effective foreign exchange provided a four percentage point benefit, excluding this our worldwide revenue growth on a performance basis was 5%, driven by both price and volume. For a fifth straight quarter, our human Pharma business drove volume growth in each major geography. US Pharma revenue increased 10% driven by price into a lesser extent volume. Our diabetes portfolio led by Trulicity, Basaglar, and Jardiance was the primary driver of volume growth with growth of 30%, offset by the losses of exclusivity for Strattera and Effient and Axiron and by a decline in volume for Cialis due to the entry of generic erectile disfunction products. For US Pharma, it's also worth noting that when excluding LOEs, the rest of our US products grew by approximately 20% in total. US price growth in the quarter was favorably impacted by an adjustment for rebates and discounts, primarily related to lower Medicaid utilization than anticipated across the portfolio. While Medicaid remains a significant segment of our US business, we estimate that the growth we experienced in this segment in the past several years has plateaued in recent months. Moving to Europe. We've been pleased with the overall performance of our new product portfolio across the region. Pharma revenue grew 2% excluding that FX, driven entirely by volume despite the loss of exclusivity for Cialis. Excluding the impact of the Cialis LOE volume grew nearly 17%. This volume growth was led by Trulicity, Olumiant, Taltz, Lartruvo, Jardiance and Basaglar. In Japan, pharma revenue increased 1% excluding the FX, driven by volume of new products namely Trulicity, Taltz and Jardiance, with a partial offset in price from the impact of the biannual price cuts. Our pharma revenue in the rest of the world increased 4% on a performance basis this quarter, led by volume growth of Trulicity, Humalog and Forteo. Turning to animal health. As we noted during our Q4 earnings call, we've been expecting to return to top-line growth in the second half of this year, and our Q1 results are on track with this expectation. Excluding FX, Elanco revenue declined 4% this quarter. I highlight, however, that revenue in Q1 actually increased 1% in performance terms when excluding the impact of products we've made the strategic decision to exit. These strategic exits are the contract manufacturing activity that came with the BIUS vaccines acquisition, as well as 2 terminated legacy US distribution agreements and Posilac. You'll see that we provided a back up slide quantifying the drivers of our animal health revenue growth excluding those strategic exits. We're encouraged with the revenue trends we're seeing in our ongoing or core business. New products contribute $ 62 million in Q1, driven primarily by Credelio, INTERCEPTOR PLUS and Galliprant. These new products drove our core companion animal portfolio up 10% in the quarter. Our core food animal business decreased 4%, primarily due the U.S. buying patterns in Q1, 2017, as well as continued ractopamine competition, importantly though our poultry business continue to deliver strong growth. In Q1, poultry products grew11%, well ahead of the market and we expect to see full-year growth for our overall core food animal portfolio. Lastly, I point out this is our second consecutive quarter with overall price growth, which is a sign of solid foundations in the industry. We expect this price growth to continue through 2018. We are monitoring the trade situation closely and while we do not see immediate impact to our animal health business, we are cautious about the broader economic impact if export activity declines. Hopefully, this provides you with useful insights into our animal health revenue growth and Jeff can address questions you may have in the Q&A session. So now let's take a look at the drivers of our worldwide volume growth on Slide 11. In total, our new products including Trulicity, Basaglar, Jardiance, Taltz, Verzenio, Olumiant, Lartruvo and Cyramza were the engine of our worldwide volume growth. You can see that these products drove 11.1 percentage points of volume growth this quarter. The loss of exclusivity of Effient, Strattera, Zyprexa, Cymbalta, Evista and Axiron provided a drag of 510 basis points, while Cialis and animal health accounted for 230 and 120 basis points of volume declined respectively. Slide 12 provides a view of our new product uptake. In total, these brands generated nearly $1.5 billion in revenue this quarter, and represented over a quarter of our total worldwide revenue. I'd like to highlight the progress in our second quarter of Verzenio launch. We are pleased with the continued new to brand shared growth which is now at 15% in the approval of the new first line metastatic breast cancer indication, giving us the broadest label in the class. Last week at AACR, we presented the final analysis of the MONARCH 3data which showed 28.2 months in progression-free survival, more than months better than placebo, as well as analysis across all patient subgroups in the MONARCH 2 and MONARCH 3 studies which demonstrated that patients with certain concerning clinical characteristics received substantial benefits in the addition of Verzenio to endocrine therapy. Moving to Slide 13. This quarter FX had a more significant effect on our results, largely driven by the euro. Excluding FX, you can see that revenue increased 5%, non-GAAP cost of sales increased just 2% and non-GAAP EPS increased 47%. Turning to our 2018 financial guidance on Slide 14. You will see that we've updated our guidance to reflect an additional $700 million on top line, driven by lower expected Medicaid utilization, changes in estimates to rebates and discounts, as well as the impact of foreign exchange rate movements. A slight increase in marketing, selling, admin and R&D expenses to account for FX movements, as well as for funding for additional pipeline opportunities. An increase of $25 million to the top end of our range for OID, and a decrease in our tax rate from 18% to 17% which reflects the change in expected geographic mix of income. These updates contribute to an increase in both GAAP and non- GAAP earnings per share. Our non-GAAP earnings per share is now expected to be $5.10 to $5.20, which is an increase of 20% over 2017 at the midpoint of the range. Now I will turn the call back over to Dave to review view the pipeline and key future bets.