1. Department of Cardiology Shandong Provincial Hospital affiliated to Shandong University Jinan P.R. China
2. Department of Obstetrics and Gynaecology BC Children's Hospital Research Institute University of British Columbia Vancouver BC Canada
3. School of Medicine Shandong University Jinan China
4. Center for Reproductive Medicine Shandong University Jinan China
5. The Key Laboratory of Reproductive Endocrinology Ministry of Education Jinan China
6. National Research Center for Assisted Reproductive Technology and Reproductive Genetics Jinan China