1. Department of Medicine, University of Mississippi, Jackson (M.S.K.).
2. Department of Medicine, Dow University of Health Sciences, Karachi, Pakistan (P.K.).
3. Department of Cardiology, Westchester Medical Center, New York Medical College, Valhalla (J.S.).
4. Department of Medicine, West Virginia University, Morgantown (S.U.K.).
5. Division of Cardiology, Johns Hopkins University School of Medicine, Baltimore, MD (E.D.M.).
6. Division of Cardiology, Northwestern University, Chicago, IL (C.W.Y.).
7. Brigham and Women’s Hospital Heart and Vascular Center, Boston, MA (H.J.W.)
8. Department of Medicine, VA Boston Healthcare System, Boston, MA (H.J.W.).