1. Department of Orthopaedics, The Third Affiliated Hospital of Southern Medical University , Guangzhou, Guangdong, People’s Republic of China
2. Department of Radiology, The First Affiliated Hospital of Guangzhou University of Chinese Medicine , Guangzhou, Guangdong, People’s Republic of China
3. Department of Orthopaedics, The First Affiliated Hospital of Guangxi University of Chinese Medicine , Nanning, Guangxi, People’s Republic of China
4. Department of Spinal Surgery, The First Affiliated Hospital of Guangzhou University of Chinese Medicine , Guangzhou, Guangdong, People’s Republic of China