[1] Guangxi Med Univ, Affiliated Hosp 1, Dept Spine Osteopathia, Nanning, Guangxi, Peoples R China
[2] Guangxi Med Univ, Coll Publ Hyg, Nanning, Guangxi, Peoples R China
[3] Guangxi Med Univ, Affiliated Hosp 1, Dept Orthopaed Trauma & Hand Surg, Nanning, Guangxi, Peoples R China