Text and Data Mining valid from 2020-01-02
Received: 25 July 2019
Accepted: 22 November 2019
First Online: 2 January 2020
Compliance with ethical standards
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the Ethics Committee of the University of Crete 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.
: The authors declare that they have no conflict of interest.