1. Evidence-Based Medicine Center, School of Basic Medical Sciences, Lanzhou University, Lanzhou City, China
2. Key Laboratory of Evidence-based Medicine and Knowledge Translation of Gansu Province, Lanzhou, China
3. Evidence-Based Nursery Center, School of Nursing, Lanzhou University, Lanzhou City, China
4. The First Clinical Medical College of Lanzhou University
5. Evidence-Based Medicine Center, Tianjin University of Traditional Chinese Medicine, Tianjin, China