[1
]
Division of Cardiovascular Medicine and Cardiovascular Institute, Stanford University,
Stanford, California.
[2
]
Section of Cardiology, Michael E. DeBakey Veterans Affairs Medical Center, Houston,
Texas3Section of Cardiovascular Research, Department of Medicine, Baylor College of
Medicine, Houston, Texas.
[3
]
Division of Cardiovascular Medicine, Veterans Affairs Palo Alto Health Care System,
Palo Alto, California.
[4
]
Division of Cardiovascular Medicine and Cardiovascular Institute, Stanford University,
Stanford, California4Division of Cardiovascular Medicine, Veterans Affairs Palo Alto
Health Care System, Palo Alto, California.