[1] Southern Med Univ, Zhujiang Hosp, Clin Res Ctr, Guangzhou, Peoples R China
[2] Hong Kong Polytech Univ, Dept Rehabil Sci, Hong Kong, Peoples R China
[3] Gen Hosp Southern Theater Command PLA, Dept Orthoped, Guangzhou, Peoples R China
[4] Southern Med Univ, Sch Publ Hlth, Dept Epidemiol, Guangzhou, Peoples R China
[5] Univ Sydney, Royal North Shore Hosp, Dept Rheumatol, Sydney, NSW, Australia
[6] Univ Sydney, Sydney Musculoskeletal Hlth, Kolling Inst, Sydney, NSW, Australia
[7] Univ Bristol, MRC Integrat Epidemiol Unit, Bristol, Avon, England
[8] Univ Bristol, Bristol Med Sch, Populat Hlth Sci, Bristol, Avon, England
[9] Southern Med Univ, Zhujiang Hosp, Dept Orthoped, Guangzhou, Peoples R China
[10] Southern Med Univ, Neurosurg Inst Guangdong Prov, Zhujiang Hosp, Guangzhou, Peoples R China
[11] South China Univ Technol, Guangzhou Peoples Hosp 1, Sch Med, Dept Rheumatol, Guangzhou, Peoples R China
[12] Youjiang Med Univ Nationalities, Affiliated Hosp, Dept Orthopaed, Baise, Peoples R China