García-Palmero, I
Torres, S
Bartolomé, R A
Peláez-García, A
Larriba, M J
Lopez-Lucendo, M
Peña, C
Escudero-Paniagua, B
Muñoz, A
Casal, J I
Article History
Received: 18 November 2015
Revised: 13 January 2016
Accepted: 26 January 2016
First Online: 14 March 2016
Competing interests
: The authors declare no conflict of interest.