1. Department of Spine Surgery, The Drum Tower Hospital of Nanjing University Medical School, Nanjing 210008, P.R. China
2. Joint Scoliosis Research Center of The Chinese University of Hong Kong and Nanjing University, Nanjing 210008 & Hong Kong 999077, P.R. China
3. Department of Chemical Pathology and School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong 999077, P.R. China
4. Li Ka Shing Institute of Health Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong 999077, P.R. China
5. Department of Orthopaedics, China-Japan Union Hospital of Jilin University, Changchun 130116, P.R. China
6. Department of Orthopaedics, The Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou 310002, P.R. China
7. Department of Orthopaedics and Traumatology, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong 999077, P.R. China