Thank you, Gigi and thank you all for joining us for the Exelixis' First Quarter 2019 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 together will review our corporate, financial, commercial and development progress for the first quarter ended March 31, 2019. Peter Lamb, our Chief Scientific Officer is with us as well and will be joining for the Q&A portion of the call. During the call today, we will refer to financial measures not calculated according to generally accepted accounting principles. Please refer to today's press release, which is posted on our website for an explanation of our reasons for using such non-GAAP measures as well as tables deriving these measures from our GAAP results. 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 and 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 stuff, market competition, regulatory review and approval processes, conducting clinical trials, compliance, that applicable regulatory requirement, our dependence on collaboration partners and the level of costs associated with commercialization, research and development, business development and other activities. Now with that, I will turn the call over to Mike.