1. Division of Cardiology, Department of Medicine, New York University School of Medicine, New York, New York, United States
2. Department of Medicine, Medical College of Wisconsin, Milwaukee, Wisconsin, United States
3. Division of Vascular Surgery, Department of Surgery, New York University School of Medicine, New York, New York, United States
4. Department of Medicine, McMaster University, Hamilton, Ontario, Canada
5. Division of Cardiovascular Medicine, Brigham and Women's Hospital, Boston, Massachusetts, United States