1. Division of Cardiovascular Medicine, Department of Medicine, University of Florida, 1600 SW Archer Road, Gainesville, FL, USA
2. Department of Cardiovascular Medicine, Heart and Vascular Institute, Cleveland Clinic, 9500 Euclid Ave, Cleveland, OH, USA
3. North Florida/South Georgia Veterans Health System, Malcom Randall Veterans Administration Medical Center, Medical Service, Cardiology Section (111D), 1601 SW Archer Road, Gainesville, FL, USA