1. Department of Occupational and Environmental Health
2. School of Public Health
3. Peking University
4. Beijing 100191
5. China
6. Department of Epidemiology
7. Fuwai Hospital
8. State Key Laboratory of Cardiovascular Disease
9. National Center for Cardiovascular Diseases
10. Chinese Academy of Medical Sciences
11. IUF-Leibniz Research Institute for Environmental Medicine
12. Düsseldorf
13. Germany
14. Department of Dermatology
15. The General Hospital of Air Force of People's Liberation Army