1. Evidence-based Medicine Center, School of Basic Medical Sciences; Lanzhou University; Lanzhou China
2. Key Laboratory of Evidence-based Medicine and Knowledge Translation of Gansu Province; Lanzhou University; Lanzhou China
3. Evidence-based Social Science Research Center, School of Public Health; Lanzhou University; Lanzhou China
4. Department of Health Research Methods, Evidence, and Impact, Faculty of Health Sciences; McMaster University; Hamilton Canada
5. The First School of Clinical Medicine, Lanzhou University; Lanzhou China
6. Department of Infectious Diseases; The First Hospital of Lanzhou University; Lanzhou China