[1] Shiga Univ Med Sci Hosp, Shiga, Japan
[2] Nippon Med Sch, Res Inst, Tokyo 113, Japan
[3] Nippon Med Sch, Natl Ctr Global Hlth & Med, Diabet Res Ctr, Dept Diabet & Metab Med, Tokyo 113, Japan
[4] Nippon Med Sch, Dept Internal Med, Div Endocrinol & Metab, Tokyo 113, Japan
[5] Univ Tokyo, Grad Sch Med, Dept Diabet & Metab Dis, Tokyo, Japan
[6] Univ Tokyo, Grad Sch Med, Dept Clin Lab Med, Tokyo, Japan
[7] Mitsui Mem Hosp, Ctr Multiphas Hlth Testing & Serv, Tokyo 101, Japan
[8] Tokyo Univ Hosp, Dept Clin Lab, Tokyo 113, Japan
[9] Tokyo Saiseikai Mukoujima Hosp, Dept Med Technol, Div Clin Lab, Tokyo, Japan
[10] Kumamoto Univ, Fac Life Sci, Dept Metab Med, Kumamoto, Japan
[11] Kumamoto Reg Med Ctr, Dept Metab Med, Kumamoto, Japan
[12] Tohoku Univ, Dept Metab Dis, Ctr Metab Dis, Grad Sch Med, Sendai, Miyagi 980, Japan
[13] Osaka Med Coll, Dept Internal Med 1, Osaka, Japan
[14] Okhotsk Kai Hosp, Kitami, Hokkaido, Japan
[15] Rehabil Hananoie Hosp, Shimotsuga, Tochigi, Japan
[16] Chubu Rosai Hospital, Nagoya, Aichi, Japan
[17] Wakayama Med Univ, Dept Clin Lab Med, Wakayama, Japan
[18] Hyogo Coll Med, Div Diabet & Metab, Dept Internal Med, Nishinomiya, Hyogo, Japan
[19] Kawasaki Med Sch, Div Diabet Metab & Endocrinol, Okayama, Japan
[20] Kagoshima Univ, Grad Sch Med & Dent Sci, Dept Diabet & Endocrine Med, Kagoshima 890, Japan
[21] Natl Inst Adv Ind Sci & Technol, Natl Metrol Inst Japan, Biomed Stand Sect, Organ Analyt Chem Div, Tsukuba, Japan
[22] Ichikawa Gen Hosp, Tokyo Dent Coll, Ctr Diabet & Endocrinol, Dept Internal Med, Chiba, Japan
[23] Reference Mat Inst Clin Chem Stand, Kawasaki, Kanagawa, Japan
[24] Gunma Univ, Dept Clin Lab Med, Grad Sch Med, Gunma, Japan