1 Section of Cardiovascular Medicine, Department of Medicine, Boston University School of Medicine, Boston Medical Center, Boston, Massachusetts, USA; CardioVascular Center, Tufts Medical Center, Boston, Massachusetts, USA.
2 CardioVascular Center, Tufts Medical Center, Boston, Massachusetts, USA.
3 Division of Cardiology, Department of Internal Medicine, Keimyung University Dongsan Hospital, Daegu, Republic of Korea.
4 Division of Cardiology, Department of Internal Medicine, Seoul St. Mary's Hospital, Catholic Research Institute for Intractable Cardiovascular Disease, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea.
5 CardioVascular Center, Tufts Medical Center, Boston, Massachusetts, USA; Department of Cardiovascular Medicine, Heart, Vascular and Thoracic Institute, Cleveland Clinic, Cleveland, Ohio, USA. Electronic address: vesta2@ccf.org.