Text and Data Mining valid from 2018-05-30
Received: 26 April 2018
Accepted: 24 May 2018
First Online: 30 May 2018
Compliance with ethical standards
: The authors declare that they have no conflict of interest.
: The study was carried out according to Declaration of Helsinki and obtained the approval of the local Ethics Committee (Fondazione Policlinico A. Gemelli). Protocol number 53572/17.
: Patients gave their informed consent to participate to the survey.