[1] Hamamatsu Univ Sch Med, Dept Orthopaed Surg, Shizuoka, Japan
[2] Univ Yamanashi, Dept Orthopaed Surg, Yamanashi, Japan
[3] Akita Univ, Dept Orthoped Surg, Grad Sch Med, Akita, Japan
[4] Nara Med Univ, Dept Orthopaed Surg, Nara, Japan
[5] Osaka Univ, Dept Orthopaed Surg, Grad Sch Med, Osaka, Japan
[6] Kitasato Univ, Sch Med, Dept Orthoped Surg, Tokyo, Kanagawa, Japan
[7] Hokkaido Univ Hosp, Dept Orthopaed Surg, Sapporo, Hokkaido, Japan
[8] Toyama Univ, Dept Orthopaed Surg, Fac Med, Toyama, Japan
[9] Keio Univ, Dept Orthoped Surg, Sch Med, Tokyo, Japan
[10] Natl Hosp Org, Dept Orthoped Surg, Hokkaido Med Ctr, Sapporo, Hokkaido, Japan
[11] Tokai Univ, Sch Med, Dept Orthopaed Surg, Surg Sci, Tokyo, Kanagawa, Japan
[12] Japanese Scoliosis Soc, Int Affairs Comm, Chiba, Japan