1. Division of Endocrinology and Metabolism (P.R.S., P.W.L.), Johns Hopkins Medical Institutions, Baltimore, Maryland 21287
2. Division of Endocrinology (B.R.H., E.C.R.), University of Colorado Health Sciences Center, Denver, Colorado 80262
3. Division of Endocrinology and Metabolism (F.P.), University of Siena, Siena 1-53100, Italy
4. Klinik und Poliklinik fuer Nuklearmedizin der Universitaet Wuerzburg (C.R., M.L.), Wuerzburg D-97070, Germany
5. Service de Medecine Nucleaire (M.S.), Institut Gustave Roussy, 94805 Villejuif, France
6. Department of Medical Specialties (S.I.S.), M. D. Anderson Cancer Center, Houston, Texas 77030
7. Division of Endocrinology (D.S.C.), Sinai Hospital of Baltimore, Baltimore, Maryland 21215
8. Division of Endocrinology (K.G.S., M.H.S.), Oregon Health and Science University, Portland, Oregon 97201
9. Section of Endocrinology, Diabetes, and Nutrition (L.E.B.), Boston University School of Medicine, Boston, Massachusetts 02118
10. Division of Intramural Research (M.C.S.), National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, Maryland 20892
11. Division of Endocrinology (T.F.D.), Mount Sinai School of Medicine, New York, New York 10029
12. University of Florida Shands Hospital (E.L.M.), Division of Endocrinology, Gainesville, Florida 32610
13. Thyroid Unit (G.H.D., D.S.R.), Massachusetts General Hospital, Boston, Massachusetts 02114
14. Trophogen Inc. (B.D.W.), Rockville, Maryland 20850