Operator Good morning, ladies and gentlemen, and welcome to the Exelixis First Quarter 2021 Financial Results Conference Call. My name is Daphne, and I'll be your operator for today. As a reminder, this call is being recorded for replay purposes. I would now like to turn the call over to your host for today, Ms. Susan Hubbard, Executive Vice President of Public Affairs and Investor Relations. Please proceed. Susan T. Hubbard -- Executive Vice President, Public Affairs and Investor Relations Thank you, Daphne, and thank you all for joining us for the Exelixis First Quarter 2021 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 Executive 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 2021 ended March 31, 2021. Peter Lamb, our Chief Scientific Officer, is also here and will join us for the question-and-answer session following our prepared remarks.