Morell, C
Bort, A
Vara, D
Ramos-Torres, A
Rodríguez-Henche, N
Díaz-Laviada, I
Article History
Received: 1 February 2016
Revised: 10 April 2016
Accepted: 2 May 2016
First Online: 21 June 2016
Competing interests
: The authors declare no conflict of interest.