1 Division of Cardiology, Kaiser Permanente Northern California, Oakland, California; Department of Medicine, University of California, San Francisco, San Francisco, California; Division of Research, Kaiser Permanente Northern California, Oakland, California. Electronic address: jamal.s.rana@kp.org.
2 Cardiovascular Imaging Program, Cardiovascular Division, and Department of Radiology, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts.