Text and Data Mining valid from 2019-02-13
Received: 3 October 2018
Accepted: 31 January 2019
First Online: 13 February 2019
Compliance with ethical guidelines
: A. Aiolfi, S. Tornese, L. Barbieri, V. Panizzo, G. Micheletto, and D. Bona declare that they have no competing interests.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. Informed consent was obtained from all individual participants included in the study.