Martínez-Calderon, M.
Manso-Silván, M.
Rodríguez, A.
Gómez-Aranzadi, M.
García-Ruiz, J. P.
Olaizola, S. M.
Martín-Palma, R. J.
Article History
Received: 19 July 2016
Accepted: 11 October 2016
First Online: 2 November 2016
Competing interests
: The authors declare no competing financial interests.