1. Paediatric Cardiology and Cardiac Arrhythmia/Syncope Unit, Department of Paediatric Cardiology and Cardiac Surgery, Bambino Gesù Children’s Hospital IRCCS , Rome , Italy
2. Department of Paediatric Cardiology, Amsterdam University Medical Centers , Amsterdam , The Netherlands
3. Laboratory of Experimental Medicine and Paediatrics, University of Antwerp , Antwerp , Belgium
4. Department of Paediatric Cardiology Hopital Necker-Enfants Malades , Paris , France
5. Hopital Marie Lannelongue-M3C, GHPSJ, Université Paris Descartes , Paris , France
6. Department of Paediatric Cardiology, Heart Centre Leipzig, University of Leipzig, Leipzig , Germany
7. Department of Paediatric Cardiology and Congenital Heart Defects, Medical University of Gdansk, Gdansk , Poland
8. Gottsegen National Cardiovascular Center , Budapest , Hungary
9. Heart Surgery Team, Department of Paediatric Cardiology and Cardiac Surgery, Bambino Gesù Children’s Hospital IRCCS , Rome , Italy
10. Department of Cardiology and Electrotherapy, Medical University of Gdansk, Gdansk , Poland
11. Department of Paediatrics, Antwerp University Hospital , Edegem , Belgium
12. Department of Paediatric Cardiology, Leiden University Medical Center , Leiden , The Netherlands