Department of Bone and Joint Surgery, The First Affiliated Hospital of Xian Medical University, Xian 710077, Shaanxi Province, PR China.|Department of Bone and Joint Surgery, The First Affiliated Hospital of Xian Medical University, Xian 710077, Shaanxi Province, PR China.|Department of Bone and Joint Surgery, The First Affiliated Hospital of Xian Medical University, Xian 710077, Shaanxi Province, PR China.|Department of Bone and Joint Surgery, The First Affiliated Hospital of Xian Medical University, Xian 710077, Shaanxi Province, PR China.