1. University of Groningen, University Medical Centre Groningen, EUROCAT Registration Northern Netherlands; Department of Genetics; Groningen The Netherlands
2. University of Groningen, University Medical Centre Groningen, Centre for Congenital Heart Diseases, Beatrix Children's Hospital; Department of Paediatric Cardiology; Groningen The Netherlands
3. University of Groningen, University Medical Centre Groningen; Department of Obstetrics and Gynaecology, Foetal Medicine Unit; Groningen The Netherlands
4. University of Groningen, University Medical Centre Groningen, Centre for Congenital Heart Diseases; Department of Cardiothoracic Surgery; Groningen The Netherlands