1. Departments of Endocrinology and Metabolism (W.G.K., W.B.K., T.Y.K., E.Y.K., Y.K.S.), Asan Medical Center, University of Ulsan College of Medicine, Seoul 138–736, Korea
2. Surgery (J.H.Y., S.J.H.), Asan Medical Center, University of Ulsan College of Medicine, Seoul 138–736, Korea
3. Thyroid Cancer Clinic (J.M.K.), National Cancer Center, Goyang 410-769; Korea
4. Nuclear Medicine (J.-S.R.), Asan Medical Center, University of Ulsan College of Medicine, Seoul 138–736, Korea
5. Pathology (G.G.), Asan Medical Center, University of Ulsan College of Medicine, Seoul 138–736, Korea