1. Departments of Neurology (J.K.E., C.B.S.) Boston, Massachusetts 02115
2. Medicine and Division of Endocrinology (R.S.A., J.S.F.) Boston, Massachusetts 02115
3. Beth Israel Deaconess Medical Center, Harvard Medical School, and The Joslin Diabetes Center, Harvard Medical School (E.M.-F.), Boston, Massachusetts 02115