[1] Showa Univ, Sch Med, Dept Med, Div Diabet Metab & Endocrinol, 1-5-8 Hatanodai,Shinagawa Ku, Tokyo 1428666, Japan
[2] Tokatsu Hosp, Dept Internal Med, Chiba, Japan
[3] Tokatsu Hosp, Huzoku Nagareyama Cent Pk Ekimae Clin, Dept Internal Med, Chiba, Japan
[4] Showa Univ, Sch Med, Div Diabet Metab & Endocrinol, Dept Med,Antiglycat Res Sect, Tokyo, Japan