1. Physiology Research Group, Federal University of Pampa, Uruguaiana, Rio Grande do Sul, Brazil
2. Department of Biological Sciences, University of Denver, Denver, Colorado
3. Department of Physiological Sciences, Piracicaba Dental School, University of Campinas, Piracicaba, São Paulo, Brazil
4. Department of Physiology, Anatomy and Microbiology, La Trobe University, Bundoora, Victoria, Australia
5. Department of Biology, Lycoming College, Williamsport, Pennsylvania
6. Department of Morphology, Physiology and Basic Pathology, University of São Paulo, Ribeirão Preto, São Paulo, Brazil