1. Department of Cardiology, The Heart Centre, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark
2. Department of Cardiology, Copenhagen University Hospital Herlev, Copenhagen, Denmark
3. Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
4. Department of Epidemiology Research, Statens Serum Institut, Copenhagen, Denmark
5. Center of Fetal Medicine and Pregnancy, Department of Obstetrics, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark
6. Center of Fetal Medicine, Department of Obstetrics and Gynecology, Copenhagen University Hospital Herlev, Copenhagen, Denmark
7. Fetal Medicine Unit, Department of Obstetrics and Gynecology, Copenhagen University Hospital Hvidovre, Copenhagen, Denmark