1. Department of Obstetrics & Gynaecology, Research Institute GROW, Maastricht University Medical Centre, Postbus 5800, 6202 AZ Maastricht, The Netherlands,
2. Department of Obstetrics and Gynecology, Leuven University Fertility Center, University Hospitals Leuven, UZ Gasthuisberg, 3000 Leuven, Belgium,
3. Department of Clinical Epidemiology and Medical Technology Assessment, Maastricht University Medical Centre, CAPHRI School of Public Health and Primary Care, Maastricht, The Netherlands,
4. World Endometriosis Research Foundation (WERF), London, UK
5. Department of Pharmaceutical and Pharmacological Sciences, KU Leuven, Leuven, Belgium