Pereira-da-Silva, L
Cabo, C
Moreira, A C
Papoila, A L
Virella, D
Neves, R
Bridges, K M
Cordeiro-Ferreira, G
Article History
Received: 11 July 2014
Revised: 3 September 2014
Accepted: 4 September 2014
First Online: 16 October 2014
Competing interests
: The authors declare no conflict of interest.