1. Department of Clinical Genetics, University of GroningenUniversity Medical Center Groningen Groningen The Netherlands
2. Beatrix Children's HospitalUniversity Medical Center Groningen Groningen The Netherlands
3. Department of Pathology and Medical BiologyUniversity of Groningen, University Medical Centre Groningen Groningen The Netherlands
4. Department of Congenital Cardiothoracic SurgeryUniversity of Groningen, University Medical Center Groningen, Beatrix Children's Hospital, Center for Congenital Heart Diseases Groningen The Netherlands
5. Department of Radiology, University of GroningenUniversity Medical Center Groningen Groningen The Netherlands
6. Department of Obstetrics and Gynaecology, Medical Center Leeuwarden Leeuwarden The Netherlands
7. Department of Obstetrics and Gynecology/Prenatal diagnosis, University Medical Centre of GroningenUniversity of Groningen Groningen The Netherlands
8. Department of Pediatric Pulmonology and Pediatric Allergy, Beatrix Children's Hospital, University Medical Center GroningenUniversity of Groningen Groningen The Netherlands