1. Department of Pharmacology, Faculty of Medicine of Ribeirão Preto, University of São Paulo, Ribeirão Preto, Brazil
2. Department of Morphology, Estomatology and Physiology, Dental School of Ribeirão Preto, University of São Paulo, Ribeirão Preto, Brazil
3. Wadsworth Center, New York State Department of Health, Albany, New York, USA