1. Zaans Medisch Centrum; Department of Obstetrics and Gynaecology; koningin Julianaplein 58 Zaandam Netherlands 1502 DV
2. University of Amsterdam, Academic Medical Center; Center for Reproductive Medicine, Department of Obstetrics and Gynaecology; Center Meibergdreef 9 Amsterdam Netherlands 1105 AZ
3. Academic Medical Center; Center for Reproductive Medicine - H4-205, Department of Obstetrics & Gynaecology; University of Amsterdam Meibergdreef 9 Amsterdam Netherlands 1105 AZ