1. Department of Preventive Medicine, Shantou University Medical College, Shantou 515041, China
2. National Health Commission Key Laboratory of Male Reproduction and Genetics, Guangzhou 510600, China
3. Department of Andrology, Guangdong Provincial Reproductive Science Institute (Guangdong Provincial Fertility Hospital), Guangzhou 510600, China
4. Human Sperm Bank, The Shanxi Bethune Hospital, Shanxi Academy of Medical Sciences, Taiyuan 030032, China
5. Human Sperm Bank, The Third Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China
6. Human Sperm Bank, the Key Laboratory of Birth Defects and Related Diseases of Women and Children of Ministry of Education, West China Second University Hospital of Sichuan University, Chengdu 610041, China
7. Reproductive Medicine Center, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
8. Human Sperm Bank, Reproductive Medicine Center, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
9. Human Sperm Bank, The Zhejiang Provincial Maternal and Child and Reproductive Health Care Center, Hangzhou 310008, China
10. Department of Atmospheric and Oceanic Science, Earth System Science Interdisciplinary Center, University of Maryland, College Park, Maryland 20740, United States