Text and Data Mining valid from 2020-02-06
Received: 11 December 2019
Accepted: 18 January 2020
First Online: 6 February 2020
Compliance with ethical standards
: Quartuccio N, Laudicella R, Mapelli P, Guglielmo P, Pizzuto DA, Boero M, Arnone G, Picchio M declare no conflict of interest related to this work.