Baragaño Raneros, A
Martín-Palanco, V
Fernandez, A F
Rodriguez, R M
Fraga, M F
Lopez-Larrea, C
Suarez-Alvarez, B
Article History
Received: 12 March 2014
Revised: 3 September 2014
Accepted: 24 September 2014
First Online: 13 November 2014
Competing interests
: The authors declare no conflict of interest.