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Authors
Smorti, Martina http://orcid.org/0000-0002-5867-9859
Milone, Annarita
Gonzalez Gonzalez, José
Vitali Rosati, Giovanni
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Article History
Received: 12 October 2018
Accepted: 26 April 2019
First Online: 17 May 2019
Ethics approval and consent to participate
: The institutional review boards approved the study. The school authorities (headteachers and teachers) were informed about the research project and its goals, and discussed and approved the online questionnaire. The school authorities informed parents of minors about the study and obtained their consent.
: Not applicable.
: The authors declare that they have no competing interests.
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