Received: 5 December 2019
Accepted: 21 January 2020
First Online: 30 January 2020
Ethics approval and consent to participate
: The experimental project was submitted to the <i>Scientific and Ethical Committee of the Alfonso X the Wise University</i>, in which a group of external experts reviewed and validated the process. To be able to participate in the study, we required a written acceptance informed consent as recommended by the Declaration of Helsinki, and it was made clear to the participants that they were not going to be involved in any experimental condition.
: Not applicable.
: The authors declare that they have no competing interests.