1. Department of Cell and Molecular Biology and Pathogenic Bioagents, Ribeirão Preto Medical School, University of São Paulo, University of São Paulo, Ribeirão Preto, São Paulo, Brazil
2. Department of Morphology, Stomatology, and Basic Pathology, School of Dentistry of Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo, Brazil