Batalla, A
Bargalló, N
Gassó, P
Molina, O
Pareto, D
Mas, S
Roca, J M
Bernardo, M
Lafuente, A
Parellada, E
Article History
Received: 27 March 2015
Revised: 3 July 2015
Accepted: 11 July 2015
First Online: 25 August 2015
Competing interests
: The authors declare no conflict of interest.