1. Chengdu Medical College; Department of Epidemiology and Biostatistics, School of Public Health; Chengdu China
2. West China Hospital, Sichuan University; Department of Evidence-Based Medicine and Clinical Epidemiology; No. 37, Guo Xue Xiang Chengdu Sichuan China 610041
3. Luzhou Medical College; Department of Nephrology; No. 319 Zhong Shan Road Luzhou Sichuan China
4. West China Hospital, Sichuan University; Department of Nephrology; No. 37, Guo Xue Xiang Chengdu Sichuan China 610041
5. West China Hospital, Sichuan University; Chinese Clinical Trial Registry, Chinese Ethics Committee of Registering Clinical Trials; No. 37, Guo Xue Xiang Chengdu Sichuan China 610041
6. West China Hospital, Sichuan University; Chinese Evidence-Based Medicine Centre; No. 37, Guo Xue Xiang Chengdu Sichuan China 610041