Costa, M R
Ponciano, V C
Costa, T R
de Oliveira, A M
Gomes, C P
de Oliveira, E C
Article History
Received: 20 July 2016
Revised: 5 February 2017
Accepted: 2 March 2017
First Online: 20 April 2017
Competing interests
: The authors declare no conflict of interest.