[1] Weifang Med Univ, Affiliated Hosp, Sch Clin Med, Dept Joint Surg, Weifang 261061, Peoples R China
[2] Weifang Med Univ, Sch Basic Med Sci, Dept Histol & Embryol, Weifang 261053, Peoples R China
[3] Weifang Med Univ, Neurol Disorders & Regenerat Repair Lab, Weifang 261053, Peoples R China
[4] Harvard Med Sch, Brigham & Womens Hosp, Dept Orthped Surg, Boston, MA 02115 USA