Received: 31 October 2019
Accepted: 9 March 2020
First Online: 3 April 2020
Ethics approval and consent to participate
: Institutional Review Board both of University of Catania and University of Messina approved the study. A written informed consent was obtained from the parents and informed assent from the children and adolescents.
: Not applicable.
: The authors have no conflicts of interest to disclose that could be perceived as prejudicing the impartiality of the research reported.