Herrero-Prieto, Luis César http://orcid.org/0000-0002-2915-5706
Boal-San Miguel, Iván http://orcid.org/0000-0001-9921-0945
Gómez-Vega, Mafalda http://orcid.org/0000-0003-0810-3517
Article History
Accepted: 4 January 2019
First Online: 18 January 2019
Compliance with Ethical Standards
:
: The authors declare that they have no conflict of interest.