Unzu, C
Melero, I
Hervás-Stubbs, S
Sampedro, A
Mancheño, U
Morales-Kastresana, A
Serrano-Mendioroz, I
de Salamanca, R E
Benito, A
Fontanellas, A
Article History
Received: 13 November 2014
Revised: 9 June 2015
Accepted: 18 June 2015
First Online: 23 July 2015
Competing interests
: The authors declare no conflict of interest.