Díaz-Manera, Jordi
Querol, Luis
Alejaldre, Aída
Rojas-García, Ricard
Ramos-Fransi, Alba
Gallardo, Eduard
Illa, Isabel
Article History
Received: 24 February 2014
Revised: 30 March 2014
Accepted: 20 April 2014
First Online: 22 May 2014
Competing interests
: The authors declare no conflict of interest.
Free to read: This content has been made available to all.