1. Cardiology, Department of Cardio-Thoracic-Vascular Sciences and Public Health, University Hospital of Padua, European Reference Network for Rare and Low Prevalence Complex Disease of the Heart (ERN GUARD-Heart), Padua
2. Cardio-Thoraco-Vascular Department, Sant’Orsola Hospital, University Hospital of Bologna IRCCS, Bologna
3. Adult Congenital Heart Disease Unit, Monaldi Hospital, Naples
4. Unit of Pediatric Cardiology, Anna Meyer Children's Hospital, Florence
5. Giannina Gaslini Hospital IRCCS, Genoa
6. Pediatric Cardiology and Cardiac Arrhythmia/Syncope Unit, and Bambino Gesù Children's Hospital, IRCCS, European Reference Network for Rare and Low Prevalence Complex Disease of the Heart (ERN GUARD-Heart). Rome, Italy