1. Stanford Cardiovascular Institute, Stanford University, Stanford, California2Division of Cardiovascular Medicine, Department of Medicine, Stanford University, Stanford, California3Veterans Affairs Palo Alto Health Care System, Stanford University, Stanford, California
2. Stanford Cardiovascular Institute, Stanford University, Stanford, California2Division of Cardiovascular Medicine, Department of Medicine, Stanford University, Stanford, California
3. Stanford Cardiovascular Institute, Stanford University, Stanford, California2Division of Cardiovascular Medicine, Department of Medicine, Stanford University, Stanford, California4Department of Radiology, Stanford University, Stanford, California