GarcĂa-Cadenas, I
Rivera, I
Martino, R
Esquirol, A
Barba, P
Novelli, S
Orti, G
Briones, J
Brunet, S
Valcarcel, D
Sierra, J
Article History
Received: 30 May 2016
Revised: 7 July 2016
Accepted: 12 July 2016
First Online: 5 September 2016
Competing interests
: The authors declare no conflict of interest.