1 Cardiovascular Section, Department of Internal Medicine, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma.
2 Duke Clinical Research Institute, Durham, North Carolina.
3 Division of Cardiology, Department of Internal Medicine, Massachusetts General Hospital, Boston, Massachusetts.
4 Department of Medicine, University of Colorado Hospital at Denver and Health Sciences Center, Aurora, Colorado.
5 University of Florida College of Medicine-Jacksonville, Jacksonville, Florida.
6 Cardiovascular Division, Department of Medicine, Brigham and Women's Hospital, Boston, Massachusetts.
7 Division of Cardiology, Department of Internal Medicine, Massachusetts General Hospital, Boston, Massachusetts. Electronic address: ryeh@partners.org.