1. MOE Key Laboratory of Pollution Processes and Environmental Criteria, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
2. Center for Reproductive Medicine, Tianjin Central Hospital of Gynecology Obstetrics, Tianjin 300100, China
3. School of Environmental Science and Engineering, Sun Yat-Sen University, Guangzhou 510275, China
4. Wadsworth Center, New York State Department of Health, Albany, New York 12237, United States