1. Department of Internal Medicine, Ito Hospital, Tokyo, Japan.
2. Division of Endocrinology and Metabolism, Department of Internal Medicine, Showa University Fujigaoka Hospital, Kanagawa, Japan.
3. Department of Molecular Endocrinology, National Research Institute for Child Health and Development, Tokyo, Japan.
4. Department of Internal Medicine, Nagoya Thyroid Clinic, Aichi, Japan.
5. Department of Surgery, Ito Hospital, Tokyo, Japan.
6. Department of Infection Control and Clinical Laboratory Medicine, Dokkyo Medical University, Tochigi, Japan.
7. Department of Pathology, Ito Hospital, Tokyo, Japan.