Fernandes, P
Simão, D
Guerreiro, M R
Kremer, E J
Coroadinha, A S
Alves, P M
Article History
Received: 14 April 2014
Revised: 8 September 2014
Accepted: 18 September 2014
First Online: 23 October 2014
Competing interests
: The authors declare no conflict of interest.