Otero, Xosé Luis http://orcid.org/0000-0001-5447-1842
De La Peña-Lastra, Saul http://orcid.org/0000-0001-8694-9388
Pérez-Alberti, Augusto
Ferreira, Tiago Osorio http://orcid.org/0000-0002-4088-7457
Huerta-Diaz, Miguel Angel http://orcid.org/0000-0001-5248-4340
Article History
Received: 16 March 2017
Accepted: 1 December 2017
First Online: 23 January 2018
Competing interests
: The authors declare no competing financial interests.