Leno-Durán, Ester
Muñoz-Fernández, Raquel
García Olivares, Enrique
Tirado-González, Irene
Article History
Received: 10 March 2014
Revised: 29 April 2014
Accepted: 1 May 2014
First Online: 23 June 2014
Competing interests
: The authors declare that no conflicts of interest exist.