Parody, R
López-Corral, L
Lopez-Godino, O
Martinez, C
Martino, R
Solano, C
Barba, P
Caballero, D
García-Cadenas, I
Piñana, J L
Marquez-Malaver, F J
Vazquez, L
Esquirol, A
Boluda, J C H
Sanchez-Guijo, F
Pérez-Simon, J A
,
Article History
First Online: 13 June 2016
Competing interests
: The authors declare no conflict of interest.