TTPH earnings call for the period ending December 31, 2018.: Tetraphase Pharmaceuticals (NASDAQ: TTPH) Q4 2018 Earnings Conference CallMarch 14, 2019 4:30 p.m. ET Good day, ladies and gentlemen, and welcome to the Tetraphase Pharmaceuticals fourth year and 2018 financial results conference call. [Operator instructions] As a reminder, this conference call is being recorded. I would now like to introduce your host for today's conference, Jennifer Viera, corporate communications. You may begin. Thank you. Good afternoon and thank you, everyone, for joining us on today's call.