Rodríguez-Muela, N
Hernández-Pinto, A M
Serrano-Puebla, A
García-Ledo, L
Latorre, S H
de la Rosa, E J
Boya, P
Article History
Received: 14 July 2014
Revised: 4 November 2014
Accepted: 5 November 2014
First Online: 12 December 2014
Competing interests
: The authors declare no conflict of interest.