1. Department of Obstetrics and Gynecology, Reproduction and Development Research Institute, Amsterdam UMC, VU Medical Center, Amsterdam, The Netherlands
2. Department of Obstetrics and Gynecology, ETZ Hospital, Tilburg, The Netherlands
3. Medical Library, VU University Amsterdam, Amsterdam, The Netherlands
4. Department of Obstetrics and Gynecology, Spaarne Gasthuis, Haarlem, The Netherlands
5. Department of Obstetrics and Gynecology, Reproduction and Development Research Institute, Amsterdam UMC, Amsterdam Medical Center, Amsterdam, The Netherlands