1. Centre for Reproductive Medicine, Universitair Ziekenhuis Brussel, Brussels, Belgium;
2. Academic Unit of Obstetrics and Gynecology, IRCCS AOU San Martino-IST, University of Genoa, Genova, Italy;
3. Department of Surgical and Clinical Science, Faculty of Medicine and Pharmacy, Vrije Universiteit Brussel, Brussels, Belgium;
4. IVI-RMA Lisbon, Lisbon, Portugal;
5. Department of Obstetrics and Gynecology, University of Zagreb-School of Medicine, Zagreb, Croatia;
6. Department of Reproductive Medicine, Dexeus University Hospital, Barcelona, Spain;
7. Department of Clinical Medicine, Faculty of Health University of Aarhus, Incuba/Skejby, Aarhus, Denmark