Received: 14 November 2019
Accepted: 6 February 2020
First Online: 18 February 2020
Ethics approval and consent to participate
: The protocol number of the research’s statement on ethics approval and consent is 1.135/8-11-12 and was provided by the Committee for Bioethics and Ethics of Faculty of Medicine, Aristotle University of Thessaloniki.
: Not applicable.
: The authors declare that they have no competing interests.