1. Department of Endocrine Surgery, Nippon Medical School Graduate School of Medicine, Tokyo, Japan.
2. Department of Surgery, Kuma Hospital, Kobe, Japan.
3. Department of Breast and Endocrine Surgery, Nagoya University, Nagoya, Japan.
4. Department of Surgery, Yokohama City University, Yokohama, Japan.
5. Department of Surgery, Ito Hospital, Tokyo, Japan.
6. Department of Surgery, Yamashita Thyroid Hospital, Fukuoka, Japan.
7. Department of Otolaryngology, Head and Neck Surgery, Kobe University, Kobe, Japan.
8. Division of Endocrinology and Metabolism, Department of Internal Medicine, Gunma University, Maebashi, Japan.
9. Department of Breast and Endocrine Surgery, Tokyo Women's Medical University, Tokyo, Japan.
10. Division of Breast and Endocrine Surgery, Department of Surgery, Shinshu University School of Medicine, Matsumoto, Japan.
11. Department of Pathology, Kuma Hospital, Kobe, Japan.
12. Department of Surgery, The Jikei University School of Medicine, Tokyo, Japan.