Atara Biotherapeutics, Inc. (NASDAQ:ATRA) Q4 2019 Results Earnings Conference Call February 27, 2020 8:00 AM ET Company Participants John Craighead - Vice President-Investor Relations and Corporate Communications Pascal Touchon - President and Chief Executive Officer AJ Joshi - Chief Medical Officer Joe Newell - Chief Operations Officer Conference Call Participants Phil Nadeau - Cowen & Company John Newman - Canaccord Matt Phipps - William Blair Salim Syed - Mizuho Securities Benjamin Burnett - Stifel Opera ...