Tavira, Beatriz
Gómez, Juan
Díaz-Corte, Carmen
Coronel, Diego
Lopez-Larrea, Carlos
Suarez, Beatriz
Coto, Eliecer
Article History
Received: 28 October 2014
Revised: 13 January 2015
Accepted: 14 January 2015
First Online: 12 February 2015
Competing interests
: The authors declare no conflict of interest.