Barneda-Zahonero, B
Collazo, O
Azagra, A
Fernández-Duran, I
Serra-Musach, J
Islam, A B M M K
Vega-García, N
Malatesta, R
Camós, M
Gómez, A
Román-González, L
Vidal, A
López-Bigas, N
Villanueva, A
Esteller, M
Parra, M
Article History
Received: 26 August 2014
Revised: 16 December 2014
Accepted: 18 December 2014
First Online: 12 February 2015
Competing interests
: The authors declare no conflict of interest.