Text and Data Mining valid from 2019-10-25
Received: 7 May 2019
Accepted: 10 October 2019
First Online: 25 October 2019
Compliance with ethical standards
: The authors declare they have no conflict of interests regarding the present work.
: This study was approved by the Ethical Committee of “Province di Verona e Rovigo, Azienda Universitaria integrata di Verona, Italy”, with Protocol number 64215, date 03/10/2018.