Ramírez, O
Burgos-Paz, W
Casas, E
Ballester, M
Bianco, E
Olalde, I
Santpere, G
Novella, V
Gut, M
Lalueza-Fox, C
Saña, M
Pérez-Enciso, M
Article History
Received: 4 March 2014
Revised: 9 July 2014
Accepted: 6 August 2014
First Online: 10 September 2014
Competing interests
: The authors declare no conflict of interest.