Received: 5 November 2019
Accepted: 13 March 2020
First Online: 24 March 2020
Ethics approval and consent to participate
: Ethics approval was sought and obtained from the Central Emilia Wide Area Ethical Committee of the Emilia-Romagna region (CE-AVEC) (PG nr. 0000315). The study was conducted in accordance with the Helsinki declaration and all patients gave informed consent in writing to participate. Parents provided written consent for the inclusion of the patients in this study, since all the patients were minors (age less than 18) at the time of participation in the study.
: Not applicable.
: The authors declare that they have no competing interests.