Text and Data Mining valid from 2020-01-20
Received: 29 July 2019
Accepted: 13 January 2020
First Online: 20 January 2020
Ethics approval and consent to participate
: All participants provided written informed consent to participate in the study, which was approved by the Ethics Committee of the University of Urbino Carlo Bo, Italy (02/2017, date of approval July 10, 2017) and was conducted in accordance with the Declaration of Helsinki for research with human volunteers (1975).
: Not applicable.
: The authors declare that they have no competing interests.