1. Department of Development and Regeneration KU Leuven Herestraat 49 Box 805, 3000 Leuven Belgium
2. Department of Obstetrics and Gynaecology University Hospitals Leuven Herestraat 49 3000 Leuven Belgium
3. Department of Obstetrics and Gynaecology RZ Heilig Hart Kliniekstraat 45 3300 Tienen Belgium
4. Department of Pathology University Hospitals Leuven Herestraat 49 3000 Leuven Belgium
5. Department of Obstetrics and Gynaecology Ikazia Hospital Montessoriweg 1 3083 AN Rotterdam The Netherlands