De La Serna, J
Sanz, J
Bermúdez, A
Cabrero, M
Serrano, D
Vallejo, C
Gómez, V
Moraleda, J M
Perez, S G
Caballero, M D
Conde, E
Lahuerta, J J
Sanz, G
,
Article History
Received: 7 October 2015
Revised: 17 November 2015
Accepted: 19 November 2015
First Online: 7 March 2016
Competing interests
: The authors declare no conflict of interest.