Received: 1 August 2019
Accepted: 20 February 2020
First Online: 3 March 2020
Ethics approval and consent to participate
: The Ethics Committee of Hellenic Open University granted permission for conducting the research. All the participants were informed on the purpose of the study and on confidentiality and they were free to participate, refuse or withdraw at any time of the procedure. Hence, returning the questionnaire was interpreted as informed consent.
: Not applicable.
: The authors report no declarations of interests.