1. Department of Physiological SciencesFederal Rural University of Rio de Janeiro Seropédica Brazil
2. Laboratory of NeurophysiologyMultidisciplinary Institute of Cell Biology La Plata Argentina
3. Centre for Neuroscience StudiesQueen's University Kingston Ontario Canada
4. Laboratory of Neuroendocrinology, Department of Biophysics, Paulista Medical SchoolFederal University of São Paulo São Paulo Brazil