Received: 8 December 2017
Accepted: 25 February 2019
First Online: 4 March 2019
Ethics approval and consent to participate
: Written information was given and verbal consent obtained from participants (because the questionnaire was anonym). Jaen Research Ethics Committee approved the study and the procedure for obtaining consent. The anonymity and confidentiality of the data were guaranteed in accordance with the Spanish Law of Data Protection.
: Not applicable.
: The authors declare they have no competing interest.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.