[1] Nagoya Univ, Grad Sch Med, Dept Orthopaed Surg, Showa Ku, 65 Tsurumai Cho, Nagoya, Aichi 4668560, Japan
[2] Chubu Rosai Hosp, Dept Orthopaed Surg, Minato Ku, 1-10-6 Komei, Nagoya, Aichi 4558530, Japan
[3] Konan Kousei Hosp, Dept Orthopaed Surg, 137 Omatsubara,Takaya Cho, Konan, Aichi 4838704, Japan
[4] Japanese Red Cross Nagoya Daini Hosp, Dept Orthopaed Surg, Showa Ku, 2-9 Myoken Cho, Nagoya, Aichi 4668650, Japan
[5] Hachiya Orthopaed Hosp, Dept Orthopaed Surg, Chikusa Ku, 2-4 Suemoridori, Nagoya, Aichi 4640821, Japan
[6] Kariya Toyota Gen Hosp, Dept Orthopaed Surg, 15 Sumiyoshi Cho5, Kariya, Aichi 4488505, Japan
[7] Aichi Med Univ, Dept Orthopaed Surg, 1-1 Iwasaku, Nagakute, Aichi 4801195, Japan
[8] Natl Ctr Geriatr & Gerontol, Dept Orthopaed Surg, 7-430 Morioka Cho, Obu, Aichi 4748511, Japan
[9] Japanese Red Cross Nagoya Daiichi Hosp, Dept Orthopaed Surg, Nakamura Ku, 3-35 Michishita Cho, Nagoya, Aichi 4538511, Japan
[10] Anjo Kosei Hosp, Dept Orthopaed Surg, 28 Higashi Kohan,Anjo Cho, Anjo, Aichi 4468602, Japan