López-Estévez, S
Ferrer, G
Torres-Torronteras, J
Mansilla, M J
Casacuberta-Serra, S
Martorell, L
Hirano, M
Martí, R
Barquinero, J
Article History
Received: 6 September 2013
Revised: 7 March 2014
Accepted: 26 March 2014
First Online: 8 May 2014
Competing interests
: The authors declare no conflict of interest.