1. The Fetal Center at Children's Memorial Hermann Hospital; McGovern Medical School at The University of Texas Health Science Center at Houston (UTHealth); TX USA
2. Department of Paediatric and Congenital Cardiology; University of Heidelberg; Heidelberg Germany
3. Department of Paediatric Cardiology; Children's Heart Centre; Linz Austria
4. University of Helsinki and Helsinki University Hospital; Helsinki Finland
5. Department of Paediatric Cardiology; University Hospital Bonn; Bonn Germany
6. Perinatal Cardiology Clinic, 2nd Department of Obstetrics and Gynecology; Medical University of Warsaw; Warsaw Poland
7. Department of Paediatric Cardiology, Queen Silvia Children's Hospital; Sahlgrenska University Hospital; Gothenburg Sweden
8. Department of Paediatric Cardiology; Sant Joan de Déu; Barcelona Spain
9. Department of Paediatric and Congenital Cardiology, Royal Brompton and Harefield Hospital, NHS Trust, and Fetal Medicine Unit; St George's Hospital NHS Trust; London UK
10. University Hospital and Masaryk University Brno; Brno Czech Republic
11. Center of Fetal Cardiology; Policlinico San Donato IRCSS; Milan Italy