Cristóbal, I
Zazo, S
Torrejón, B
Pedregal, M
Madoz-Gúrpide, J
Lluch, A
Eroles, P
Rovira, A
Albanell, J
García-Foncillas, J
Rojo, F
Article History
First Online: 9 January 2017
Competing interests
: The authors declare no conflict of interest.