1. KULeuven, Department of Development and Regeneration, Organ systems, Leuven, Belgium
2. Department of Obstetrics and Gynaecology, Leuven University Fertility Centre, University Hospital Leuven, Leuven, Belgium
3. Department of Human Genetics, KU Leuven and University Hospitals Leuven, Leuven, Belgium
4. Reproductive Endocrinology & Infertility, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA