1. The Fertility Clinic; Skive Regional Hospital; Copenhagen Denmark
2. Department of Obstetrics; Copenhagen University Hospital Rigshospitalet; Copenhagen Denmark
3. Department of Obstetrics and Gynecology; Copenhagen University Hospital Herlev Gentofte; Herlev Denmark
4. Department of Obstetrics and Gynecology; Vendsyssel Hospital; Aalborg University; Aalborg Denmark
5. Department of Obstetrics and Gynecology; Nordsjaellands Hospital; Hillerød Denmark
6. Department of Gynecology and Obstetrics; Odense University Hospital; Odense Denmark
7. Department of Clinical Pharmacology; Aarhus University Hospital; Aarhus Denmark
8. Department of Clinical Microbiology; Vejle Hospital; Vejle Denmark
9. Statens Serum Institute; Copenhagen Denmark
10. Department of Obstetrics and Gynecology; Aarhus University Hospital; Skejby Denmark