Text and Data Mining valid from 2019-07-18
Received: 11 April 2019
Accepted: 8 July 2019
First Online: 18 July 2019
Ethics approval and consent to participate
: Informed consent was obtained from all participants with the questionnaire. The study was approved by the Camilo José Cela University Ethics Committee and it was carried out in accordance with the procedures approved by the Declaration of Helsinki.
: Not applicable.
: The authors declare that they have no competing interests.