[1] Univ Phayao, Sch Med, Dept Orthopaed, Phayao, Thailand
[2] Seoul Seonam Hosp, Dept Orthopaed Surg, Seoul, South Korea
[3] Chulalongkorn Univ, Fac Med, Dept Orthopaed, Bangkok, Thailand
[4] King Chulalongkorn Mem Hosp, Bangkok, Thailand
[5] Chulalongkorn Univ, Ctr Excellence Biomech & Innovat Spine Surg, Bangkok, Thailand
[6] Queen Savang Vadhana Mem Hosp, Dept Orthoped, Sriracha, Chonburi, Thailand
[7] Silla Univ, Dept Comp Engn, Busan, South Korea
[8] Chiang Mai Univ, Fac Med, Dept Orthopaed, Chiang Mai 50200, Thailand