1. Children’s Heart Centre, Second Faculty of Medicine, Motol University Hospital, Charles University, Prague, the Czech Republic
2. Department of Pediatric Cardiology, The University Hospital Brno, Faculty of Medicine of Masaryk University, Brno, the Czech Republic
3. Department of Pediatrics and Prenatal Cardiology, University Hospital Ostrava, Ostrava, the Czech Republic
4. Department of Pediatrics, University Hospital in Pilsen, Charles University, Pilsen, the Czech Republic
5. Department of Pediatrics, Olomouc University Hospital and Faculty of Medicine and Dentistry, Palacký University Olomouc, Olomouc, the Czech Republic
6. Department of Pediatrics, Masaryk Hospital, Ústí nad Labem, the Czech Republic
7. Centre for Medical Genetics, České Budějovice, the Czech Republic
8. Gennet, Centre for Fetal Medicine and Reproductive Genetics, Prague, the Czech Republic
9. Department of Obstetrics and Gynecology of the First Faculty of Medicine, Charles University and General University Hospital, Prague, the Czech Republic
10. Fetal Medicine Center, Brno, the Czech Republic
11. Department of Probability and Mathematical Statistics, Faculty of Mathematics and Physics, Charles University, Prague, the Czech Republic
12. Great Ormond Street Hospital for Children and Institute of Cardiovascular Sciences UCL, London, United Kingdom