1. Department of Medicine, New York Medical College, Valhalla, NY
2. Division of Cardiology, New York Medical College, Valhalla, NY
3. Division of Cardiology, Mount Sinai Medical Center, New York, NY
4. Veterans Affairs Medical Center, Washington, DC
5. Heart and Vascular Center, Brigham and Women's Hospital, Harvard Medical School, Boston, MA
6. David Geffen School of Medicine, University of California at Los Angeles, CA