Received: 26 April 2021
Accepted: 15 December 2021
First Online: 22 January 2022
: Ethical approval was obtained from the Research Ethics Committee of the University of Deusto (reference number: ETK-21/18-19). The ethics committee approved to obtain a verbal consent following this procedure: The study was explained to the potential subjects, providing them all pertinent information (purpose, procedures, and benefits); they were also informed that by filling a data sheet containing information without any personal identification they would consent to participate. Confidentiality and anonymity were ensured.
: Not applicable.
: The authors declare that they have no competing interests.