Cristóbal, I
Manso, R
Rincón, R
Caramés, C
Zazo, S
del Pulgar, T G
Cebrián, A
Madoz-Gúrpide, J
Rojo, F
García-Foncillas, J
Article History
Received: 27 January 2014
Revised: 20 May 2014
Accepted: 13 June 2014
First Online: 8 July 2014
Competing interests
: The authors declare no conflict of interest.