1. American Board of Internal Medicine, Philadelphia, Pennsylvania (B.M.G., J.L.V.)
2. Department of Medicine and The Center for Healthcare Delivery Science, Beth Israel Deaconess Medical Center, Boston, Massachusetts (J.P.S.)
3. Department of Medicine and The Center for Healthcare Delivery Science, Beth Israel Deaconess Medical Center, and Department of Health Care Policy, Harvard Medical School, Boston, Massachusetts (B.E.L.).