Thank you, Leann and thank you all for joining us for the Exelixis' first quarter 2017 financial results conference call. Joining me on today's call are Mike Morrissey, our President and CEO, Chris Senner, our Chief Financial Officer, P.J. Haley, our Senior Vice President of Commercial, and Gisela Schwab, our Chief Medical Officer, who will together review our corporate, financial, commercial and development progress for the quarter ended March 31, 2017 as well as recent key developments and corporate events. Peter Lamb, our Chief Scientific Officer is also here with us today and will participate in the Q&A session following our prepared remarks. As a reminder, we are reporting our financial results on a GAAP basis only and as usual the complete press release with our results can be accessed through our website at exelixis.com. During the course of this presentation, we will be making forward-looking statements regarding future events and the future performance of the company. This includes statements about possible developments regarding clinical, regulatory, commercial, financial and strategic matters. Actual events or results could, of course, differ materially. We refer you to the documents we file from time-to-time with the SEC which under the heading Risk Factors identify important factors that could cause actual results to differ materially from those expressed by the company verbally and in writing today, including without limitation, risk and uncertainties related to product commercial success, market competition, regulatory review and approval processes, conducting clinical trials, compliance with applicable regulatory requirements, the availability of data at the reference time, our dependence on collaboration partners and our ability to maintain our rights under existing collaborations and the level of cost associated with commercialization, research and development and other activities. Now with that I will turn the call over to Mike.