[1] Kobe Univ, Grad Sch Med, Dept Internal Med, Div Diabet & Endocrinol, Kobe 6500017, Japan
[2] Kobe Univ, Grad Sch Med, Dept Orthoped Surg, Kobe 6500017, Japan
[3] Kobe Univ Hosp, Div Diabet & Endocrinol, 7-5-2Kusunoki Cho,Chuo Ku, Kobe, Hyogo 6500017, Japan
[4] Okayama Univ, Okayama Univ Hosp, Grad Sch Med Dent & Pharmaceut Sci, Dept Child Neurol, Okayama 7008558, Japan
[5] Kobe Univ, Grad Sch Med, Div Rehabil Med, Kobe 6500017, Japan
[6] Osaka Prefectural Hosp Org, Osaka Womens & Childrens Hosp, Dept Bone & Mineral Res, Osaka 5941101, Japan