1. The Third Affiliated Hospital, Zunyi Medical University, Zunyi 563000, China
2. School of Public Health, Zunyi Medical University, Zunyi 563000, China
3. Key Laboratory of Maternal & Child Health and Exposure Science, Guizhou Higher Education Institutes, School of Public Health, Zunyi Medical University, Zunyi 563000, China
4. Renhuai Center for Disease Control and Prevention, Zunyi 563000, China
5. Reproductive Center, Affiliated Hospital of Zunyi Medical University, Zunyi 563000, China
6. Department of Andrology, School of Medicine, Jinling Hospital, Nanjing University, Nanjing 210002, China