Funding for this research was provided by:
This study was supported by RG’s Institutional research fund-Unicam (FPA000033)
Text and Data Mining valid from 2019-11-28
Received: 1 October 2019
Accepted: 19 November 2019
First Online: 28 November 2019
Ethics approval and consent to participate
: Parental consent was obtained from all participants. The study protocol has been approved by the general direction of Area Vasta 2, Jesi, Marche (Italy), in accordance with the Declaration of Helsinki (revised edition) and with international and local regulatory requirements.
: Not applicable.
: The authors declare that they have no competing interests.