1. Center for Reproductive Medicine, Shandong University, Jinan, Shandong, P.R. China
2. Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, Shandong, P.R. China
3. Key Laboratory of Reproductive Endocrinology of Ministry of Education, Shandong University, Jinan, Shandong, P.R. China
4. Shandong Key Laboratory of Reproductive Medicine, Jinan, Shandong, P.R. China
5. Shandong Provincial Clinical Research Center for Reproductive Health, Jinan, Shandong, P.R. China
6. Shandong Technology Innovation Center for Reproductive Health, Jinan, Shandong, P.R. China