1. Department of Orthopedics, Xiangyang No.1 People's Hospital, Hubei University of Medicine, Xiangyang, China
2. Department of Spine Surgery, Shengli Oilfield Central Hospital, Dongying, Shandong, China
3. Department of Pathology, Qujing Second People's Hospital of Yunnan Province, Qujing, China
4. Department of Spine Surgery, Qujing First People's Hospital: Kunming Medical University Affiliated Qujing Hospital, Qujing, Yunnan, China