1. Center for Reproductive Medicine, Amsterdam Research Institute Reproduction and Development, Academic Medical Centre, University of Amsterdam, Meibergdreef 9, 1105 AZ Amsterdam, The Netherlands
2. Department of Obstetrics and Gynaecology, Amsterdam Reproduction and Development Research Institute, Academic Medical Centre, Meibergdeef 9, 1105 AZ, Amsterdam, The Netherlands
3. Department of Clinical Epidemiology, Biostatistics and Bioinformatics, Amsterdam Public Health Research Institute, Academic Medical Centre, Meibergdeef 9, 1105 AZ, Amsterdam, The Netherlands