1. Second Department of Spine Surgery, Changzheng Hospital, Navy Medical University, Shanghai, China (mainland)
2. Department of Orthopedic Surgery, No. 906 Hospital of the People’s Liberation Army (PLA), Ningbo, Zhejiang, China (mainland)
3. Department of Orthopedics, Guangzhou General Hospital of Guangzhou Military Command, Guangzhou, Guangdong, China (mainland)