1. Department of Cancer Epidemiology and Prevention, Henan Engineering Research Center of Cancer Prevention and Control, Henan International Joint Laboratory of Cancer Prevention, The Affiliated Cancer Hospital of Zhengzhou University & Henan Cancer Hospital, Zhengzhou, Henan 450008, China
2. Department of Epidemiology, College of Public Health, Zhengzhou University, Zhengzhou, Henan 450001, China
3. Clinical Trials Center, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
4. Department of Nursing, The Affiliated Cancer Hospital of Zhengzhou University & Henan Cancer Hospital, Zhengzhou, Henan 450008, China
5. Henan University of Chinese Medicine, Zhengzhou, Henan 450046, China
6. Nursing and Health School of Zhengzhou University, Zhengzhou, Henan 450001, China
7. International College of Zhengzhou University, Zhengzhou, Henan 450001, China
8. Evidence-Based Medicine Center, School of Basic Medical Sciences, Lanzhou University, Lanzhou, Gansu 730000, China
9. Key Laboratory of Evidence-Based Medicine and Knowledge Translation of Gansu Province, Lanzhou, Gansu 730000, China.