^○Yuya Tanaka¹, Hiroyuki Sugaya², Norimasa Takahashi², Morihito Tokai², Kazutomo Oonishi², Shouta Hoshika² (1.Tokyo Women's Medical University / Ushiku Aiwa General Hospital, 2.Funabashi Orthopedics Hopital)

^○Noboru Matsumura¹, Satoshi Oki¹, Yusuke Kawano¹, Morio Matsumoto¹, Masaya Nakamura¹, Masahiro Jinzaki², Takeo Nagura¹ (1.Department of Orthopedic Surgery, Keio University School of Medicine, 2.Department of Radiology, Keio University School of Medicine)

^○Jun Kawakami¹, Nobuyuki Yamamoto², Taku Hatta², Ryouhei Isawa³, Mitsuyoshi Mineta^2,3, Eiji Itoi² (1.Takeda General Hospital, 2.Tohoku University School of Medicine, 3.Kamisugiyama Orhtopaedic Clinic)

^○Satoshi Oki¹, Noboru Matsumura¹, Yuhei Takada¹, Hideyuki Shirasawa¹, Takeo Nagura² (1.Department of Orthopedics, Keio University School of Medicine, 2.Department of Biomechanics, Keio University School of Medicine)

^○Shinsaku Ogimoto, Toshiyuki Tsuruta (Tsuruta Orthopaedic Clinic)

^○Shuichi Moriya^1,2, Daisuke Kurokawa¹, Minoru Tanaka¹, Kazuo Kaneko², Katsumi Sato¹ (1.Tohoku Rosai Hospital, 2.Juntendo University)

^○Suguru Nagai, Kazuhide Suzuki (Asao General Hospital)

^○Hiroyuki Shiozaki, Hiroshi Kitahara, Tomoyuki Ito, Hiroshi Yamagiwa (Saiseikai Niigata Daini Hospital)

^○Makoto Tanaka, Kenji Hayashida (Dept of Orthopaedic Surgery, Osaka Police Hospital)

^○Hirotaka Sano¹, Tatsuro Komatsuda², Hiroo Abe¹ (1.Sendai City Hospital, 2.North Sendai Orthopaedic Clinic)