1. Department of Spinal Surgery, Affiliated Jiangmen Hospital of Traditional Chinese Medicine of Jinan University, Jiangmen, Guangdong, China
2. Department of Orthopedics, Puning Peoples’ Hospital, Puning, Guangdong, China
3. Department of Spinal Surgery, Affiliated 4th Hospital of Guangzhou Medical University, Guangzhou, Guangdong, China