[1
]Pediatric Unit, Fondazione Ca’ Granda Ospedale Maggiore Policlinico and Department
of Clinical Sciences and Community Health, Università degli Studi di Milano, Milan,
Italy
[2
]Department of Pediatrics, University Children’s Hospital of Bern, Inselspital, Bern,
Switzerland
[3
]Pediatric Department of Southern Switzerland, Bellinzona, Switzerland4Università della
Svizzera Italiana, Lugano, Switzerland