1. Lanzhou University; Evidence-Based Medicine Center, School of Basic Medical Sciences; Lanzhou City China
2. Gansu Provincial Hospital; Department of Anesthesia; No. 204, Donggang West Road Lanzhou City Gansu China 730000
3. Nanyang Central Hospital; Department of Pediatric Surgery; Nanyang Henan China 473000
4. Lanzhou University; Key Laboratory of Evidence Based Medicine and Knowledge Translation of Gansu Province; No. 199, Donggang West Road Lanzhou City Gansu China 730000
5. Chinese Medicine Hospital in Gansu Province; Department of Radiology; Lanzhou City Gansu China 730000
6. Lanzhou University; Epidemiology and Health Statistics Institution of School of Public Health; No. 199, Donggang West Road Lanzhou City Gansu China 730000
7. Kurashiki Central Hospital; Department of General Medicine; 1-1-1 Miwa Kurashiki Okayama Japan 710-8602