Text and Data Mining valid from 2018-12-01
Received: 23 March 2018
Accepted: 19 November 2018
First Online: 1 December 2018
Compliance with ethical standards
: All the procedures performed in the human participants studied were in accordance with the ethical standards of the institutional and/or national research committee(s), and with the 1964 Declaration of Helsinki and its later amendments or any other comparable ethical standards.
: Informed consent was obtained from all the individual participants included in the study.