1 Division of Cardiology, Morehouse School of Medicine, Atlanta, GA Division of Cardiology, Atlanta VA Medical Center, Decatur, GA Division of Cardiology, Atlanta VA Medical Center, Decatur, GA, and Division of Cardiology, Emory University School of Medicine, Atlanta, GA Division of Cardiology, Morehouse School of Medicine, Atlanta, GA, Division of Cardiology, Medical College of Georgia, Augusta, GA, Division of Cardiology, Atlanta VA Medical Center, Decatur, GA, and Division of Cardiology, Emory University School of Medicine, Atlanta, GA.