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 Second Affiliated Hospital of Xi'an Jiaotong University; Xi'an China
4. The Michael G. DeGroote Institute for Pain Research and Care; McMaster University; Hamilton Canada
5. Department of Health Research Methods, Evidence, and Impact; McMaster University; Hamilton Canada
6. School of Chinese Medicine; Hong Kong Baptist University; Hong Kong Special Administrative Region China
7. Interdisciplinary Centre for Health Studies CIESAL, Universidad de Valparaíso; Viña del Mar Chile
8. Cochrane Associate Centre, School of Medicine; Universidad de Valparaíso; Viña del Mar Chile
9. Interdisciplinary Centre for Health Studies CIESAL; Universidad de Valparaíso; Viña del Mar Chile
10. Iberoamerican Cochrane Centre; Institut d'Investigació Biomèdica Sant Pau (IIB Sant Pau), CIBERESP; Barcelona Spain
11. Sixth Department of General Surgery, The First Hospital; Lanzhou University; Lanzhou China