1. Department of Microbiology and Infectious Disease Center, School of Basic Medical Sciences, Peking University Health Science Center, Beijing, People’s Republic of China
2. Department of Urology, Peking University Third Hospital, Beijing, People’s Republic of China
3. Center for Reproductive Medicine, Peking University Third Hospital, Beijing, People’s Republic of China
4. Department of Andrology, Third Affiliated Hospital of Zhengzhou University, Zhengzhou, People’s Republic of China
5. Department of Urology, Peking University First Hospital, Beijing, People’s Republic of China
6. State Key Laboratory for Animal Disease Control and Prevention, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin, People’s Republic of China