1. Department of Cardiology, University Medical Center Groningen; University of Groningen; Groningen The Netherlands
2. The Netherlands Heart Institute (ICIN); Utrecht The Netherlands
3. Department of Obstetrics, University Medical Center Groningen; University of Groningen; Groningen The Netherlands
4. Department of Cardiology; Isala Zwolle The Netherlands
5. Department of Obstetrics, University Medical Center Utrecht; University of Utrecht; Utrecht The Netherlands
6. Department of Epidemiology, University Medical Center Groningen; University of Groningen; Groningen The Netherlands
7. Department of Cardiology, Academic Medical Center; University of Amsterdam; Amsterdam The Netherlands
8. Department of Cardiology, Erasmus Medical Center; University of Rotterdam; Rotterdam The Netherlands
9. Department of Cardiology; University Medical Center Utrecht; Utrecht The Netherlands
10. Department of Obstetrics, Academic Medical Center; University of Amsterdam; Amsterdam The Netherlands