Received: 26 November 2020
Accepted: 30 April 2021
First Online: 7 May 2021
: This study was undertaken with the authorisation of the Asturias Research Ethics Committee (no. 2020.532) and in accordance with the ethical guidelines of the Declaration of Helsinki and of Organic Law 3/2018, of 5 December 2018, on the protection of personal data and the guarantee of digital rights. All the students participated in the study voluntarily and signed an informed consent form.
: Not applicable.
: The authors declare that they have no competing interests.