1. Center for Reproductive MedicineShandong University Jinan China
2. National Research Center for Assisted Reproductive Technology and Reproductive Genetics Jinan China
3. The Key Laboratory for Reproductive Endocrinology of Ministry of Education Jinan China
4. Department of Pediatric Surgery, Shanghai Children's HospitalShanghai Jiao Tong University Shanghai China
5. Faculty of Basic Medical Sciences, Department of MicrobiologyGuilin Medical University Guilin China
6. Department of UrologyShandong Provincial Qianfoshan Hospital Jinan China
7. Department of UrologyShandong Provincial Hospital Affiliated to Shandong University Jinan China