López-Villamor, A. http://orcid.org/0000-0001-7822-0538
Fernández-López, J. http://orcid.org/0000-0003-4216-3417
Míguez-Soto, B. http://orcid.org/0000-0003-2947-7876
Sánchez, M. E. http://orcid.org/0000-0002-8546-5119
Article History
Received: 13 June 2018
Accepted: 13 November 2018
First Online: 21 November 2018
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.