Córdova-Palomera, A
Fatjó-Vilas, M
Gastó, C
Navarro, V
Krebs, M-O
Fañanás, L
Article History
Received: 1 December 2014
Revised: 2 March 2015
Accepted: 9 March 2015
First Online: 28 April 2015
Competing interests
: The authors declare no conflict of interest.