1. Evidence-Based Social Science Research Center, School of Public Health, Lanzhou University, Lanzhou, China
2. Department of Social Medicine and Health Management, School of Public Health, Lanzhou University, Lanzhou, China
3. Evidence-Based Nursing Center, School of Nursing, Lanzhou University, Lanzhou, China
4. Evidence-Based Medicine Center, School of Basic Medical Sciences, Lanzhou University, Lanzhou, China
5. Key Laboratory of Evidence Based Medicine and Knowledge Translation of Gansu Province, Lanzhou, China