González-Calle, V
Dávila, J
Escalante, F
de Coca, A G
Aguilera, C
López, R
Bárez, A
Alonso, J M
Hernández, R
Hernández, J M
de la Fuente, P
Puig, N
Ocio, E M
Gutiérrez, N C
García-Sanz, R
Mateos, M V
Article History
Received: 22 February 2016
Revised: 7 April 2016
Accepted: 12 April 2016
First Online: 2 May 2016
Competing interests
: The authors declare no conflict of interest.