Vinyoles, M
Del Valle-Pérez, B
Curto, J
Padilla, M
Villarroel, A
Yang, J
de Herreros, A G
Duñach, M
Article History
Received: 19 June 2015
Revised: 18 March 2016
Accepted: 8 May 2016
First Online: 20 June 2016
Competing interests
: The authors declare no conflict of interest.