1. Fertility Clinic; Department of Obstetrics/Gynecology; Hvidovre Hospital; University of Copenhagen; Hvidovre Denmark
2. Fertility Clinic; Rigshospitalet; University of Copenhagen; Copenhagen Denmark
3. Department of Public Health and General Practice; Norwegian University of Science and Technology (NTNU); Trondheim Norway
4. Spiren Fertility Clinic; Trondheim Norway
5. Department of Obstetrics and Gynecology; Institute for Clinical Sciences; Sahlgrenska Academy at the University of Gothenburg; Gothenburg Sweden
6. Fertility Clinic; The Family Federation of Finland; Helsinki Finland
7. Department of Medical Genetics; Helsinki University Central Hospital (HUCH); Helsinki Finland