1. Department of Obstetrics and Gynecology, University Hospital, LMU Munich, Munich, Germany
2. Department of Gynecology and Obstetrics, Shanghai Jiao Tong University, School of Medicine, Renji Hospital, Shanghai, China
3. Department of Pathology, University Hospital, LMU Munich, Munich, Germany
4. Division of Gynecological Endocrinology and Reproductive Medicine, Department of Gynecology and Obstetrics, University Hospital, LMU Munich, Munich, Germany