[1] Kyorin Univ, Sch Med, Dept Diabet Endocrinol & Metab, Tokyo, Japan
[2] Univ Shizuoka, Sch Food & Nutr Sci, Lab Clin Nutr, 52-1 Yada,Suruga Ku, Shizuoka 4228526, Japan
[3] Kyorin Univ, Sch Med, Dept Urol, Tokyo, Japan
[4] Nagahama City Hosp, Res Ctr Hlth Care, Nagahama, Shiga, Japan