1. Department of Biology Structural and Functional; State University of Campinas-UNICAMP; Campinas, São Paulo Brazil
2. Department of Cell Biology, Histology and Embryology; Federal University of Goiás-UFG; Goiânia, Goiás Brazil
3. Department of Biology; Univ. Estadual Paulista-UNESP; São José Do Rio Preto, São Paulo Brazil