[1] Osaka Koseinenkin Hosp, Dept Orthopaed Surg, Osaka, Japan
[2] Takarazuka Daiichi Hosp, Dept Orthopaed Surg, Takarazuka, Hyogo, Japan
[3] Mishuku Hosp, Dept Orthopaed Surg, Tokyo, Japan
[4] Int Univ Hlth & Welf, Prevent Hlth Examinat Ctr, Tokyo, Japan