Article History
Received: 11 May 2018
Accepted: 29 November 2018
First Online: 18 December 2018
Compliance with ethical standards
: <b>Research Involving Human Participants</b>
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the Ethics Committee of the University Hospital of Heraklion, Crete, Greece (no. 82, 3/20.07.2005) 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.