1. Family Medicine Institute, Faculty of Biomedical Science, Università della Svizzera italiana , Lugano , Switzerland
2. Department of Internal Medicine , Ente Ospedaliero Cantonale , Lugano , Switzerland
3. Department of Pediatrics , Pediatric Cardiology Unit, Centre Hospitalier Universitaire Vaudois and University of Lausanne , Lausanne , Switzerland
4. Pediatric Institute of Southern Switzerland, Ente Ospedaliero Cantonale , Bellinzona , Switzerland
5. Department of Gynecology and Obstetrics , Centro di Senologia della Svizzera Italiana, Ente Ospedaliero Cantonale , Lugano , Switzerland
6. Infectious Diseases Unit , Ente Ospedaliero Cantonale , Bellinzona , Switzerland
7. Department of Internal Medicine , Ente Ospedaliero Cantonale , Bellinzona , Switzerland
8. Pediatric Unit, Fondazione IRCCS Ca’ Granda Ospedale Maggiore Policlinico , Milan , Italy
9. Department of Clinical Sciences and Community Health , Università degli Studi di Milano , Milan , Italy