Bazeia, D.
Pereira, M. B. P. N.
Brito, A. V.
Oliveira, B.F. de
Ramos, J. G. G. S.
Article History
Received: 16 November 2016
Accepted: 14 February 2017
First Online: 21 March 2017
Competing interests
: The authors declare no competing financial interests.