Affiliation: | 1. Department of Medicine, University of California, San Francisco, San Francisco, California;2. Division of Cardiology, Massachusetts General Hospital, Boston, Massachusetts;3. Division of Cardiology, Kaiser Permanente, Washington, DC;4. Division of Cardiology, University of Colorado, Denver Veterans Affairs, Denver, Colorado;5. Division of Electrophysiology, University of Wisconsin, Madison, Wisconsin;6. Division of Cardiovascular Medicine, Brigham and Women''s Hospital, Boston Veterans Affairs System, Boston, Massachusetts;g Division of Cardiology, University of California, San Francisco, San Francisco General Hospital, San Francisco, California;h Division of Cardiology, University of Washington, Seattle, Washington |