1. Department of Medicine (T.L.S., L.L.S., K.C.P., A.M.D., A.J.B.), Durham, North Carolina 27710
2. Division of Endocrinology (T.L.S., K.C.P., A.J.B.), Durham, North Carolina 27710
3. Duke University (N.D.H.), Durham, North Carolina 27710
4. Division of Gastroenterology (A.M.D.), Duke University Medical Center, Durham, North Carolina 27710