1. Institute of Reproductive and Child Health/National Health Commission Key Laboratory of Reproductive Health and Department of Epidemiology and Biostatistics/Ministry of Education Key Laboratory of Epidemiology of Major Diseases (PKU), School of Public Health, Peking University Health Science Centre, Beijing 100083, China
2. National Environment Management Authority, Kampala 22255, Uganda
3. State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
4. Institute of Medical Technology, Peking University Health Science Centre, Beijing100083, China
5. Advanced Institute of Information Technology, Peking University, Hangzhou 100871, China
6. College of Environmental Sciences and Engineering, Peking University, Beijing 100084, China
7. State Environmental Protection Key Laboratory of Atmospheric Exposure and Health Risk Management, Center for Environment and Health, Peking University, Beijing 100871, China