1. Department of Obstetrics and Prenatal Diagnosis Leiden University Medical Center Leiden The Netherlands
2. Department of Cardiology Leiden University Medical Center Leiden the Netherlands
3. Department of Anatomy & Embryology Leiden University Medical Center Leiden the Netherlands
4. Department of Biomedical Data Sciences Section Medical Statistics Leiden University Medical Center Leiden The Netherlands
5. Department of Pediatric Cardiology Leiden University Medical Center Leiden The Netherlands