Llorens-Martín, M
Jurado-Arjona, J
Fuster-Matanzo, A
Hernández, F
Rábano, A
Ávila, J
Article History
Received: 19 May 2014
Revised: 24 July 2014
Accepted: 13 August 2014
First Online: 14 October 2014
Competing interests
: The authors declare no conflict of interest.