Acknowledgments
The authors are grateful to Dr Augusto Mota and to Dr Lorena Marçal for their contribution to this study. This study was supported by Conselho Nacional de Pesquisa (CNPq) and Fundação de Apoio a Pesquisa do Estado da Bahia (FAPESB). The authors have no conflicts of interest.
Declaration of interest: The authors report no conflicts of interest. The authors alone are responsible for the content and writing of the paper.