1. School of nursing; Chinese Academy of Medical Sciences and Peking Union Medical College; Beijing China
2. Evidence-Based Medicine Center, School of Basic Medical Sciences; Lanzhou University; Lanzhou China
3. National Cancer Center/National Cancer Clinical Medical Research Center/Cancer Hospital ; Chinese Academy of Medical Sciences and Peking Union Medical College; Beijing China
4. Chinese Evidence-Based Medicine Center and Cochrane China Center; West China Hospital, Sichuan University ; Chengdu China