1. Department of Paediatrics, First Hospital of Lanzhou University, Lanzhou, Gansu, China
2. Evidence-Based Medicine Center, Lanzhou University, Lanzhou, Gansu, China
3. School of Basic Medical Sciences, Lanzhou University, Lanzhou, Gansu, China
4. Evidence-Based Nursing Center, School of Nursing, Lanzhou University, Lanzhou, Gansu, China
5. School of Nursing, Gansu University of Chinese Medicine, Lanzhou, Gansu, China
6. The First Clinical Medical College, Lanzhou University, Lanzhou, Gansu, China