1. Center for Clinical Epidemiology and Methodology (CCEM) Guangdong Second Provincial General Hospital Guangzhou China
2. Department of Health Research Methods, Evidence, and Impact (HEI) McMaster University Hamilton Canada
3. Cambridge University Hospitals NHS Foundation Trust Cambridge UK
4. Departments of Medicine and Radiology University of Manitoba Winnipeg Canada
5. Department of Medicine McMaster University Hamilton Canada
6. Department of Orthopaedics and Traumatology Guangdong Second Provincial General Hospital Guangzhou China
7. Department of Endocrinology Guangdong Second Provincial General Hospital Guangzhou China
8. Department of Orthopedics No. 2 (Spinal Surgery) Guangdong Provincial Hospital of Chinese Medicine Zhuhai China