1. Department of Spinal Surgery, Shihezi General Hospital of the Eighth Division, Shihezi 832002, China
2. Department of Orthopaedic Surgery, Beijing Jishuitan Hospital, Fourth Clinical College of Peking University, National Center for Orthopaedics, Beijing 100035, China
3. Department of Spine Surgery, Beijing Jishuitan Hospital, Fourth Clinical College of Peking University, National Center for Orthopaedics, Beijing 100035, China
4. Department of Orthopaedic Surgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, China
5. Department of Orthopedics, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China