1. GROW (B.D., P.G., A.R.), University Hospital Maastricht, 6202 AZ Maastricht, The Netherlands
2. School for Oncology and Developmental Biology, University Maastricht, and Department of Obstetrics and Gynecology (B.D., G.D., A.R.), University Hospital Maastricht, 6202 AZ Maastricht, The Netherlands
3. Department of Obstetrics and Gynecology (T.D., C.K.), University Hospital Gasthuisberg, 3000 Leuven, Belgium