1. Thyroid Section, Division of Endocrinology, Hypertension, and Diabetes (N.K., M.M., T.E.A., X.L., E.M., P.R.L., M.I.K., E.K.A.), Boston, Massachusetts 02115
2. Department of Pathology (E.S.C., J.F.K., J.A.B.), The Brigham & Women's Hospital and Harvard Medical School, Boston, Massachusetts 02115