Martínez-Fuentes, Oscar https://orcid.org/0000-0001-9447-6592
Martínez-Guerra, Rafael
Article History
Received: 17 October 2017
Accepted: 6 July 2018
First Online: 16 July 2018
Compliance with ethical standards
:
: The authors declare that there is no conflict of interest regarding the publication of this paper.