1. Division of General Medicine and Primary Care, Department of Medicine, Harvard Medical School, and Beth Israel Hospital, the Charles A. Dana Research Institute, and the Harvard-Thorndike Laboratory
2. Division of General Medicine and Primary Care, Department of Medicine, Harvard Medical School, and Beth Israel Hospital, the Charles A. Dana Research Institute, and the Harvard-Thorndike Laboratory, Division of Clinical Epidemiology, Department of Medicine, Beth Israel Hospital, Boston, Massachusetts