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