1. Division of Endocrinology and Metabolism, Department of Medicine, Thyroid Center, Samsung Medical Center; Sungkyunkwan University School of Medicine; Seoul Korea
2. Cancer Registration and Statistics Branch; Division of Cancer Registration and Surveillance; National Cancer Center; Goyang Korea
3. Department of Otolaryngology-Head and Neck Surgery; Head & Neck Oncology Clinic, Center for Thyroid Cancer, National Cancer Center; Goyang Korea