1. Division of Endocrinology (A.B., K.D.B., L.W.), Washington, DC 20010
2. Division of Nuclear Medicine (M.S., F.A., D.V.N.), MedStar Washington Hospital Center, Washington, DC 20010
3. Department of Medicine, MedStar Health Research Institute (A.B., S.D., M.M.), Washington, DC 20010