1. Center of Fetal Medicine and Pregnancy, Department of Obstetrics Copenhagen University Hospital Rigshospitalet Copenhagen Denmark
2. University of Copenhagen Faculty of Health Sciences Copenhagen Denmark
3. Department of Clinical Biochemistry Copenhagen University Hospital Rigshospitalet Glostrup Denmark
4. Department of Cardiology Copenhagen University Hospital Rigshospitalet Copenhagen Denmark
5. Department of Cardiology Copenhagen University Hospital Herlev Herlev Denmark
6. Fetal Medicine Unit, Department of Obstetrics and Gynecology Copenhagen University Hospital Hvidovre Hvidovre Denmark
7. Department of Obstetrics and Gynecology Copenhagen University Hospital Herlev Herlev Denmark