1. Evidence‐Based Medicine Center, School of Basic Medical Sciences Lanzhou University Lanzhou China
2. Evidence‐Based Social Science Research Center, School of Public Health Lanzhou University Lanzhou China
3. The Michael G. DeGroote Institute for Pain Research and Care McMaster University Hamilton Canada
4. Department of Health Research Methodology, Evidence and Impact McMaster University Hamilton Canada
5. Department of Clinical Research Management, West China Hospital Sichuan University Chengdu China
6. The First School of Clinical Medicine Lanzhou University Lanzhou China
7. Campbell Collaboration New Delhi India