1. Center of Fetal Medicine, Department of Obstetrics; Copenhagen University Hospital, Rigshospitalet; Copenhagen Denmark
2. Faculty of Health Sciences; University of Copenhagen; Copenhagen Denmark
3. Department of Clinical Biochemistry; Copenhagen University Hospital, Herlev and Gentofte Hospital; Copenhagen Denmark
4. Department of Clinical Genetics; Copenhagen University Hospital, Rigshospitalet; Copenhagen Denmark
5. Department of Obstetrics and Gynecology; Copenhagen University Hospital, Herlev; Copenhagen Denmark