Text and Data Mining valid from 2019-12-01
Received: 22 July 2018
Accepted: 12 December 2019
First Online: 21 December 2019
Ethics approval and consent to participate
: Before data collection, the approval of the local ethics committee, the Scientific Committee of the 6th Regional Health Directorate of Greece, was requested. The committee with a formal document approved the research presented in the current manuscript (reference number 86–7/3/2016). Besides this, all the participants were asked for informed written consent for their participation and those who did not wish to take part, were excluded.
: Not applicable.
: The authors declare that they have no competing interests.