1. Departments of Pediatrics (S.A.R., C.A.D.), Yale University School of Medicine, New Haven, Connecticut 06520;
2. Yale Pediatric Thyroid Center (S.A.R., C.K.B., C.A.D., R.U.), Yale University School of Medicine, New Haven, Connecticut 06520;
3. Division of Endocrinology (E.L.M.), University of Florida, Gainesville, Florida 32611;
4. Division of Endocrinology (E.L.M.), Ohio State University, Columbus, Ohio 43235;
5. Department of Nuclear Medicine (F.A.V., C.R.), University of Wuerzburg, 97070 Wuerzburg, Germany;
6. Department of Nuclear Medicine (M.L.), University of Ulm, 89081 Ulm, Germany
7. Surgery (C.K.B., R.U.), Yale University School of Medicine, New Haven, Connecticut 06520;