García, Francisca C
García-Martín, Enma Elena
Taboada, Fernando González
Sal, Sofía
Serret, Pablo
López-Urrutia, Ángel
Article History
Received: 24 June 2015
Revised: 27 September 2015
Accepted: 4 October 2015
First Online: 4 December 2015
Competing interests
: The authors declare no conflict of interest.