1. West China Hospital, Sichuan University; Chinese Evidence-Based Medicine Centre; No. 37, Guo Xue Xiang Chengdu Sichuan China 610041
2. West China Hospital, Sichuan University; Department of Clinical Epidemiology; No. 37, Guo Xue Xiang Chengdu Sichuan China 610041
3. Third Hospital; Department of Cardiothoracic Surgery; Sun Yat-Sen University Guangzhou China
4. West China Hospital, Sichuan University; Department of Abdominal Cancer; No. 37, Guo Xue Xiang Chengdu Sichuan China 610041
5. West China Hospital, Sichuan University; Department of Medical Oncology; No. 37, Guo Xue Xiang Chengdu Sichuan China 610041
6. No 1 Da Xue Road Chengdu China 610041