1. Orthopedic Ward III (Spine Microsurgery), PKU Care Luzhong Hospital, Zibo, Shandong, China
2. Department of Orthopedic Surgery, The Third People’s Hospital of Qingdao, Qingdao, Shandong, China
3. Department of Pediatric Orthopaedics, Qingdao Women and Children’s Hospital, Qingdao, Shandong, China