1. Department of Pediatric CardiologyCenter for Congenital Heart DiseasesBeatrix Children’s HospitalUniversity Medical Center GroningenUniversity of Groningen Groningen the Netherlands
2. Department of NeonatologyUniversity Medical Center GroningenUniversity of Groningen Groningen the Netherlands
3. Department of EpidemiologyUniversity Medical Center GroningenUniversity of Groningen Groningen the Netherlands