Affiliation: | 1. Department of Medicine, Division of Cardiology, University of California, San Francisco, San Francisco, Ca, United States;2. Department of Medicine, University of California, San Francisco, San Francisco, Ca, United States;3. Division of Cardiology, Brigham and Women''s Hospital and Harvard Medical School, Boston, MA, United States;4. Division of Cardiology, San Francisco General Hospital, University of California, San Francisco, San Francisco, CA, United States |