[1] Keio Univ, Dept Orthopaed Surg, Sch Med, 35 Shinanomachi,Shinju ku, Tokyo 1608582, Japan
[2] Japanese Red Cross Shizuoka Hosp, Dept Orthopaed Surg, 8-2 Otemachi,Aoi ku, Shizuoka 4200853, Japan
[3] Natl Hosp Org Murayama Med Ctr, Dept Orthopaed Surg, 2-37-1 Gakuen, Musashimurayama, Tokyo 2080011, Japan
[4] Keiyu Orthoped Hosp, 2267 Akodacho, Tatebayashi, Gunma 3740013, Japan
[5] Kanazawa Univ, Grad Sch Med Sci, Dept Orthopaed Surg, 13-1 Takara machi, Kanazawa, Ishikawa 9208641, Japan
[6] Toyama Prefectural Cent Hosp, Dept Orthopaed Surg, 2-2-78 Nishinagae, Toyama, Toyama 9308550, Japan
[7] Nagoya Univ, Dept Orthoped Surg, Grad Sch Med, 65 Tsurumai cho,Showa ku, Nagoya 4668550, Japan
[8] Univ Tsukuba, Fac Med, Dept Orthopaed Surg, 1-1-1 Tennodai, Tsukuba, Ibaraki 3058575, Japan
[9] Univ Tsukuba, Grad Sch Comprehens Human Sci, Dept Orthopaed Surg, 1-1-1 Tennodai, Tsukuba, Ibaraki 3058575, Japan
[10] Ibaraki Seinan Med Ctr Hosp, Dept Orthopaed Surg, 2190 Sakaimachi, Sashima, Ibaraki 3060433, Japan
[11] Chiba Univ, Grad Sch Med, Dept Orthopaed Surg, 1-8-1 Inohana,Chuo-ku, Chiba, Chiba 2608670, Japan
[12] Univ Fukui, Dept Orthopaed & Rehabil Med, Fac Med Sci, 23-3 Matsuoka Shimoaizuki, Eiheiji, Fukui 9101193, Japan
[13] Hamamatsu Univ Sch Med, Dept Orthopaed Surg, 1-20-1 Handayama,Higashi ku, Hamamatsu, Shizuoka 4313192, Japan
[14] Nagoya Kyoritsu Hosp, Dept Orthopaed Surg, 1-172 Hokke,Nakagawa ku, Nagoya, Aichi 4540933, Japan
[15] Sapporo Med Univ, Dept Orthopaed Surg, South 1 West 16-291,Chuo ku, Sapporo 0608543, Japan
[16] Matsuda Orthoped Mem Hosp, Dept Orthopaed Surg, North 18 East 4-1 Kita ku, Sapporo 0010018, Japan
[17] Yamaguchi Univ, Dept Orthopaed Surg, Grad Sch Med, 1-1-1 Minami kogushi, Ube, Yamaguchi 7558505, Japan
[18] Shinshu Univ, Dept Orthopaed Surg, Sch Med, 3-1-1 Asahi, Matsumoto, Nagano 3908621, Japan
[19] Kyoto Prefectural Univ Med, Grad Sch Med Sci, Dept Orthopaed, Kamigyo ku, Kyoto 6028566, Japan
[20] Saiseikai Shiga Hosp, Dept Orthopaed, 2-4-1 Ohashi, Ritto, Shiga 5203046, Japan
[21] Tohoku Univ, Dept Orthopaed Surg, Grad Sch Med, 1-1 Seiryo machi,Aoba ku, Sendai, Miyagi 9808574, Japan
[22] Kyushu Univ, Grad Sch Med Sci, Dept Orthopaed Surg, 3-1-1 Maidashi Higashi ku, Fukuoka 8128582, Japan
[23] Nihon Univ Hosp, Dept Orthopaed Surg, 1-6 Kanda Surugadai,Chiyoda ku, Tokyo 1018393, Japan
[24] Nihon Univ, Dept Orthopaed Surg, Sch Med, 30-1 Oyaguchi Kami cho,Itabashi ku, Tokyo 1738610, Japan
[25] Kawasaki Med Sch, Dept Orthoped Traumatol & Spine Surg, 577 Matsushima, Kurashiki, Okayama 7010192, Japan
[26] Osaka Metropolitan Univ, Dept Orthopaed Surg, Grad Sch Med, 1-4-3 Asahimachi,Abeno ku, Osaka, Osaka 5458585, Japan
[27] Kitasato Univ, Dept Orthopaed Surg, Sch Med, 1-15-1 Kitazato,Minami ku, Sagamihara, Kanagawa 2520374, Japan
[28] Kochi Univ, Kochi Med Sch, Dept Orthopaed Surg, Nankoku 7838505, Japan
[29] Gunma Univ, Grad Sch Med, Dept Orthopaed Surg, 3-39-22 Showa, Maebashi, Gunma 3718511, Japan
[30] Int Univ Hlth & Welf, Sch Med, Dept Orthopaed Surg, 852 Hatakeda, Narita, Chiba 2860124, Japan
[31] Int Univ Hlth & Welf, Narita Hosp, Dept Orthopaed Surg, 852 Hatakeda, Narita, Chiba 2860124, Japan
[32] Int Univ Hlth & Welf, Mita Hosp, Dept Orthopaed Surg, 1-4-3 Mita,Minato ku, Tokyo 1088329, Japan
[33] Int Univ Hlth & Welf, Mita Hosp, Spine & Spinal Cord Ctr, 1-4-3 Mita,Minato ku, Tokyo 1088329, Japan
[34] Osaka Univ, Dept Orthopaed Surg, Grad Sch Med, 2-2 Yamadaoka, Suita, Osaka 5650871, Japan
[35] Tokyo Med & Dent Univ, Dept Orthopaed Surg, Yushima 1-5-45,Bunkyo Ku, Tokyo 1138519, Japan
[36] Kansai Med Univ Hosp, Dept Orthopaed Surg, 2-3-1 Shinmachi, Hirakata, Osaka 5731191, Japan