Text and Data Mining valid from 2018-06-26
Received: 19 September 2017
Accepted: 13 June 2018
First Online: 26 June 2018
Ethics approval and consent to participate
: The study has obtain the approval of CEICA, the Local Ethics Commitee. The questionnaires did not contain any details which could identify the worker and, once collected, were kept in such a manner that only the research team could have access to them, thus ensuring total confidentiality. Informed consent was given by every participant prior to their inclusion in the study.
: Not applicable.
: The authors declare that they have no competing interests.
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