[1] Natl Hosp Org Tokyo Med Ctr, Dept Orthopaed Surg, 2-5-1 Higashigaoka,Meguro Ku, Meguro, Tokyo 1528902, Japan
[2] Teikyo Univ, Sch Med, Dept Orthopaed Surg, 2-11-1 Kaga, Tokyo, Tokyo 1738605, Japan
[3] Juntendo Univ, Sch Med, Dept Orthopaed Surg, 1-5-29 Yushima, Bunkyo-ku, Bunkyo City, Tokyo 1130034, Japan
[4] Teikyo Univ, Sch Med, Dept Rehabil, 2-11-1, Kaga, Tokyo, Tokyo 1738605, Japan
[5] Saitama Med Univ, Dept Palliat Med, 38 Morohongo Moroyamamachi, Iruma, Saitama 3500495, Japan
[6] Kobe Univ, Sch Med, Dept Rehabil, 7-5-2 Kusunokicho Kobe Chuo-ku, Kobe, Hyogo 6500017, Japan
[7] Bell Land Gen Hosp, Dept Orthopaed Surg, 500-3 Higashiyama, Naka-ku,, Sakai, Osaka 5998247, Japan
[8] NTT Med Ctr Tokyo, Dept Orthopaed Surg, 5-9-22 Higashigotanda, Shinagawa, Tokyo 1418625, Japan
[9] Towa Hosp, 4-7-10 Towa, Adachi-ku, Adachi, Tokyo 1200003, Japan