Riba, J
Valle, M
Sampedro, F
Rodríguez-Pujadas, A
Martínez-Horta, S
Kulisevsky, J
Rodríguez-Fornells, A
Article History
Received: 29 October 2014
Revised: 5 February 2015
Accepted: 13 February 2015
First Online: 31 March 2015
Competing interests
: The authors declare no conflict of interest.