1. First Hospital of Lanzhou University; Lanzhou City China
2. Department of Health Research Methodology, Evidence and Impact; McMaster University; Hamilton Canada
3. The Michael G. DeGroote Institute for Pain Research and Care; McMaster University; Hamilton Canada
4. Evidence-Based Medicine Center, School of Basic Medical Sciences; Lanzhou University; Lanzhou City China
5. Global Health Nursing, Graduate School of Nursing Science; St. Luke's International University; Tokyo Japan
6. Chinese Clinical Trial Registry, Chinese Ethics Committee of Registering Clinical Trials; West China Hospital, Sichuan University; Chengdu China
7. School of Chinese Medicine; Hong Kong Baptist University; Hong Kong Special Administrative Region China