[1] Showa Univ, Sch Med, Div Diabet Metab & Endocrinol, Dept Med,Shinagawa Ku, 1-5-8 Hatanodai, Tokyo 1428666, Japan
[2] Showa Univ, Sch Dent, Dept Oral Pathol & Diag, Shinagawa Ku, Tokyo 1428555, Japan
[3] Ban Thyroid Clin, Megro Ku, Tokyo 1520035, Japan
[4] Nippon Med Sch, Dept Surg, Div Endocrine Surg, Bunkyo Ku, Tokyo 1138602, Japan
[5] Biosys Technol Inc, Meguro Ku, Tokyo 1520031, Japan
[6] Showa Univ, Comprehens Res Ctr Oral Canc, Shinagawa Ku, Tokyo 1428555, Japan