1. First Clinical Medical College of Lanzhou University, Lanzhou 730000, P.R. China
2. Evidence-Based Medicine Center of Lanzhou University, Lanzhou 730000, P.R. China
3. Key Laboratory of Evidence-Based Medicine and Knowledge Translation of Gansu Province, Lanzhou 730000, P.R. China
4. Second People's Hospital of Lanzhou City, Lanzhou 730046, P.R. China
5. Gansu Provincial Academic Institute for Medical Research, Gansu Provincial Cancer Hospital, Lanzhou 730050, P.R. China
6. Institute for Research in Operative Medicine, Faculty of Health, School of Medicine, Witten/Herdecke University, 51109, Cologne, Germany
7. School of Public Health of Lanzhou University, Lanzhou 730000, P.R. China
8. Department of Breast-Thyroid Surgery, The Second Xiangya Hospital of Central South University, Changsha 410000, P.R. China
9. Institute of Modern Physics of Chinese Academy of Sciences, Lanzhou 730000, P.R. China