Vírseda-Chamorro, M
Salinas-Casado, J
Barroso-Manso, Á
Gutiérrez-Martín, P
Fuertes, M E
Article History
Received: 13 September 2016
Revised: 10 March 2017
Accepted: 28 March 2017
First Online: 16 May 2017
Competing interests
: The authors declare no conflict of interest.