Text and Data Mining valid from 2019-12-01
Received: 6 May 2019
Accepted: 2 October 2019
First Online: 4 December 2019
Ethics approval and consent to participate
: The present study was approved by the institutional ethics committee (Fondazione Policlinico Universitario A. Gemelli, Prot N. 0007987/17). All participants provided written informed consent in accordance with ethical guidelines.
: All authors have approved the manuscript for publication.
: The authors declare that they have no competing interests.