Text and Data Mining valid from 2020-02-11
Received: 21 November 2019
Accepted: 29 January 2020
First Online: 11 February 2020
Ethics approval and consent to participate
: This study was approved by the Ethics Committee of Policlinico Umberto I of Rome (protocol number 130/13). All study participants provided a written informed consent.
: All study participants provided a written informed consent for publication.
: The authors declared that they have no competing interest.