Martínez-Galera, A. J.
Brihuega, I.
Gutiérrez-Rubio, A.
Stauber, T.
Gómez-Rodríguez, J. M.
Article History
Received: 29 September 2014
Accepted: 11 November 2014
First Online: 4 December 2014
Competing interests
: The authors declare no competing financial interests.