1. Pediatric Institute of Southern Switzerland Ospedale San Giovanni Bellinzona Switzerland
2. Cardiology Unit Department of Pediatrics Centre Hospitalier Universitaire Vaudois Lausanne Switzerland
3. Pediatric Unit Fondazione IRCCS Ca’ Granda Ospedale Maggiore Policlinico Milan Italy
4. Department of Clinical Sciences and Community Health Università degli Studi di Milano Milan Italy
5. Università della Svizzera Italiana Lugano Switzerland