1. Division of Endocrinology, Department of Medicine (J.J.), Georgetown University Medical Center, Washington, D.C. 20007
2. Department of Biostatistics (G.N.-G., M.M.), Houston, Texas 77230
3. Department of Endocrine Neoplasia and Hormonal Disorders (D.L., S.I.S), University of Texas M. D. Anderson Cancer Center, Houston, Texas 77230
4. Department of Internal Medicine (K.B.A.), Veterans Affairs Medical Center and University of Kentucky, Lexington, Kentucky 40536
5. Division of Endocrinology (S.T.B.), Maine Medical Center, Portland, Maine 04102
6. Department of Radiation Oncology (J.D.B.), Princess Margaret Hospital, Toronto, Ontario, Canada M5G 2M9
7. Division of Endocrinology and Metabolism (D.S.C., P.W.L.), Johns Hopkins University School of Medicine, Baltimore, Maryland 21287
8. Division of Endocrinology, Metabolism, and Diabetes (B.R.H.), University of Colorado at Denver and Health Sciences Center, Aurora, Colorado 80045
9. Genzyme Corp. (J.M.), Cambridge, Massachusetts 02142
10. Clinical Endocrinology Branch (J.R., M.C.S.), National Institutes of Health, Bethesda, Maryland 20892
11. Thyroid Unit (D.S.R.), Massachusetts General Hospital, Boston, Massachusetts 02114
12. Department of Head and Neck Surgery (D.L.S.), Cincinnati, Ohio 45267
13. Department of Nuclear Medicine (H.R.M.), University of Cincinnati Medical Center, Cincinnati, Ohio 45267