1 Division of Cardiovascular Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts; Department of Medicine, Cardiology Section, Veterans Affairs Boston Healthcare System, Boston, Massachusetts. Electronic address: hwarraich@partners.org.
2 Department of Internal Medicine, Section on Cardiovascular Medicine, Wake Forest School of Medicine, Winston Salem, North Carolina.
3 Department of Medicine, Cardiology Division, Duke University School of Medicine, Durham, North Carolina; Duke Clinical Research Institute, Durham, North Carolina.
4 Department of Medicine, Cardiology Division, Duke University School of Medicine, Durham, North Carolina.
5 Department of Medicine, Thomas Jefferson University, Philadelphia, Pennsylvania.