Gagnon Cardiovascular Institute, Morristown Medical Center, Morristown, New Jersey, USA. University of California-Los Angeles, Medical Center, Los Angeles, California, USA. Division of Cardiology, Baylor University Medical Center, Dallas, Texas, USA. California University of Science and Medicine, Colton, California, USA. University of California-Berkeley, Berkeley, California, USA. Saint Louis University, St. Louis, Missouri, USA. University of California, Irvine, School of Medicine, Orange, California, USA. University of California, Irvine, School of Medicine, Orange, California, USA; Division of Cardiology, Department of Medicine, Tibor Rubin VA Medical Center, Long Beach, California, USA. Electronic address: arnold.seto@va.gov.