1 Department of Cardiovascular Diseases, The John Ochsner Heart and Vascular Institute, Ochsner Clinical School-The University of Queensland School of Medicine, New Orleans, Louisiana. Electronic address: clavie@ochsner.org.
2 Department of Internal Medicine and Institute of Health Care Delivery and Population Science, University of Massachusetts Medical School and Division of Cardiovascular Medicine, Bay State Medical Center, Springfield, Massachusetts.
3 Section of Cardiology, Baylor College of Medicine and Michael E. DeBakey VA Medical Center, Houston, Texas.