1. School of Public Health, Shanxi Medical University, Taiyuan, China
2. Center of Clinical Epidemiology and Evidence Based Medicine, Shanxi Medical University, Taiyuan, China
3. Department of nephrology, Yuncheng Central Hospital, Yuncheng, China
4. Department of nephrology, Linfen People’s Hospital, Linfen, China
5. Department of nephrology, Houma People’s Hospital, Houma, China
6. Department of nephrology, Linfen Central Hospital, Linfen, China
7. National Immunization Program, Chinese Center for Disease Control and Prevention, Beijing, China
8. Chinese Preventive Medicine Association, Beijing, China