Received: 19 July 2019
Accepted: 13 January 2020
First Online: 24 January 2020
Ethics approval and consent to participate
: The study has been approved by the Ethical Review Board of the University of Campania “L. Vanvitelli” (N. 416, 2016). All recruited patients signed a consent form to participate in the study.
: All authors gave their consent for publication.
: The authors declare that they have no competing interests.