1. Department of Reproductive Medicine and Gynecology, University Medical Center Utrecht, The Netherlands
2. The Fertility Clinic, Skive Regional Hospital, Faculty of Health, Aarhus University, Skive, Denmark
3. Eugonia Assisted Reproduction Unit, 7 Ventiri Street, 11528 Athens, Greece
4. Fertinova Clinics, Helsinki, Finland
5. European Society of Human Reproduction and Embryology, Belgium