1. Department of Obstetrics and Gynaecology; University Medical Center Utrecht; Utrecht The Netherlands
2. Department of Obstetrics; University Medical Center Groningen, University of Groningen; Groningen The Netherlands
3. Department of Neonatology; University Medical Center Utrecht; Utrecht The Netherlands
4. Department of Pediatric Cardiology; University Medical Center Groningen, University of Groningen; Groningen The Netherlands
5. Department of Pediatric Cardiology; University Medical Center Utrecht; Utrecht The Netherlands