Pérez-Nombela, S
Barroso, F
Torricelli, D
de los Reyes-Guzmán, A
del-Ama, A J
Gómez-Soriano, J
Pons, J L
Gil-Agudo, Á
Article History
Received: 9 October 2015
Revised: 21 March 2016
Accepted: 24 May 2016
First Online: 28 June 2016
Competing interests
: The authors declare no conflict of interest.