Dhruv S Kazi1, Ann F Bolger2. 1. Medicine (Cardiology), University of California San Francisco, CA, USA; Department of Epidemiology and Biostatistics, University of California San Francisco, CA, USA; Center for Healthcare Value, University of California San Francisco, CA, USA; Division of Cardiology, San Francisco General Hospital, San Francisco, CA, USA. Electronic address: kazi@ucsf.edu. 2. Medicine (Cardiology), University of California San Francisco, CA, USA; Division of Cardiology, San Francisco General Hospital, San Francisco, CA, USA.