1. Department of Health Related Social & Behavioral Science, West China School of Public Health, Sichuan University, Chengdu, China
2. Chengdu Medical College, Chengdu, China
3. Department of Reproductive Endocrinology, West China Second University Hospital/West China Women's & Children's Hospital, Chengdu, China
4. Fujian Provincial Key Laboratory of Environment Factors & Cancer, School of Public Health, Fujian Medical University, Fuzhou, China