1. Department of Obstetrics and Gynecology, Aarhus University Hospital, Aarhus, Denmark
2. Department of Obstetrics and Gynecology, Randers Regional Hospital, Randers, Denmark
3. Department of Clinical Medicine, University of Aarhus
4. Department of Clinical Medicine, Center for Fetal Diagnostics, Aarhus University Hospital, Aarhus, Denmark
5. Department of Biological and Chemical Engineering, Aarhus University, Aarhus, Denmark