1. ACHD UNIT, Pediatric and Adult Congenital Heart Centre, IRCCS-Policlinico San Donato , San Donato Milanese, Via Morandi 30, 20097 Milan , Italy
2. European Reference Network for Rare and Low Prevalence Complex Diseases of the Heart: ERN GUARD-Heart
3. Vita Salute San Raffaele University , 20132 Milan , Italy