1. Department of Orthopedic Surgery, The First People’s Hospital of Yunnan Province, Affiliated Hospital of Kunming University of Science and Technology, Kunming, P. R. China
2. Faculty of Medical Science, Kunming University of Science and Technology, Kunming, P. R. China
3. Yunnan Key Laboratory of Digital Orthopaedics, Kunming, P. R. China
4. Department of Spinal Surgery, Qujing No. 1 Hospital, Affiliated Qujing Hospital of Kunming Medical University, Qujing, P. R. China