De Andres, C
García, M I
Goicoechea, H
Martínez-Ginés, M L
García-Domínguez, J M
Martín, M L
Romero-Delgado, F
Benguría, A
Sanjurjo, M
López-Fernández, L A
Article History
Received: 15 January 2016
Revised: 15 June 2016
Accepted: 23 June 2016
First Online: 27 September 2016
Competing interests
: The authors declare no conflict of interest.