Text and Data Mining valid from 2019-03-11
Received: 10 August 2018
Accepted: 8 January 2019
First Online: 11 March 2019
Ethics approval and consent to participate
: Approval to conduct this study was obtained from the Institutional Review Board of the University of Campania “Luigi Vanvitelli”, Naples, Italy (N. Prot. 1030) and each participant accepted to participate in the study.
: Not applicable
: The authors declare that they have no competing interests.
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