Received: 21 July 2019
Accepted: 23 October 2019
First Online: 16 November 2019
Ethics approval and consent to participate
: Ethics approval for the study was obtained by the Human Research Ethics Committee of the Aristotle University of Thessaloniki.Informed consent was given from participants in this research for future uses of data, such as publication, preservation, and long-term use of research data. Confidentiality was assured. The information collected was kept confidential and serial numbers was used instead of names.
: Not applicable.
: The authors declare that they have no competing interests.