The affiliations given for authors seven and eight were incorrect in the original version. The corrected author and affiliations list should read:
F. L. dos S. Ezequiel1, R. L. Edvan2, F. L. de Azevedo1, P. C. B. de Farias1, R. R. do Nascimento2, D. M. A. Barros2, M. J. de Araújo2, R. de S. Miranda3, L. R. Bezerra1 and E. M. Santos4
1Graduate Program in Animal Science, Center for Rural Health and Technology, Federal University of Campina Grande, Patos, PB, Brazil; 2Department of Animal Science, Federal University of Piauí, Bom Jesus, PI, Brazil; 3Graduate Program in Agricultural Sciences, Federal University of Piauí, Bom Jesus, PI, Brazil and 4Department of Animal Science, Federal University of Paraíba, CCA, Areia, PB, Brazil