1. Department of Orthopaedics, Xijing Hospital, The Air Force Medical University, Xi’an, PR China
2. Department of Spine Surgery, the Affiliated Hospital of Qingdao University, Qingdao, PR China
3. Department of Spine Surgery, Zhengzhou Orthopaedic Hospital, Zhengzhou, PR China
4. Department of Orthopedics, The Third Hospital of Hebei Medical University, The Key Laboratory of Orthopedic Biomechanics of Hebei Province, Shijiazhuang, PR China
5. Spine Center, Department of Orthopedics, Changzheng Hospital, Second Military Medical University, Shanghai, PR China
6. The Second Xiangya Hospital of Central South University, Changsha, PR China
7. Department of Orthopaedics, the General Hospital of Northern Theater Command, Shenyang, PR China
8. Department of Orthopedic Surgery, West China Hospital, Sichuan University, Sichuan, PR China
9. General Hospital of Ningxia Medical University, Yinchuan, PR China
10. Department of Orthopedic Surgery, Qilu Hospital of Shandong University, Jinan, PR China
11. Department of Spine Surgery, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, PR China
12. Department of Orthopaedics, The Second Affiliated Hospital and Yuying Children’s Hospital of Wenzhou Medical University, Wenzhou, PR China
13. The First Affiliated Hospital of Nanjing Medical University, Nanjing, PR China
14. Department of Orthopedics, Daping Hospital, Army Medical University, Chongqing, PR China
15. Department of Spinal Surgery, Changhai Hospital, Second Military Medical University, Shanghai, PR China
16. Department of Orthopaedics, The First Affiliated Hospital of Anhui Medical University, Hefei, PR China
17. The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, PR China
18. The Third Xiangya Hospital of Central South University, Changsha, PR China
19. Department of Spine Surgery, The 940th Hospital of Joint Logistics Support Force of Chinese PLA, Lanzhou, PR China
20. Department of Orthopaedics, Tangdu Hospital, The Fourth Military Medical University, Xi'an, PR China
21. Guangdong Province Hospital of Traditional Chinese Medicine, Guangzhou, PR China
22. Department of Orthopedics, General Hospital of Southern Theater Command of Chinese PLA, Guangzhou, PR China
23. Shanghai Key Laboratory of Orthopaedic Implants, Department of Orthopaedic Surgery, Shanghai Ninth People's Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, PR China
24. Department of Orthopaedic Surgery, Fuyang People's Hospital, Fuyang Clinical College of Anhui Medical University, Fuyang, PR China
25. Department of Orthopedics, PLA 960th Hospital, Jinan, PR China
26. Department of Spine Surgery, Hefei Orthopaedics Hospital, Hefei, PR China
27. Shaoyang Zhenggu Hospital, Shaoyang, PR China
28. Hebei Aidebao Hospital, Zhengzhou, Langfang, PR China
29. Department of Cardiology, Xijing Hospital, The Air Force Medical University, Xi’an, PR China
30. Department of Spine Surgery, Honghui Hospital, Xi'an Jiaotong University, Xi'an, PR China