1. Department of Stomatology, Division of Oral Pathology, School of Dentistry, University of São Paulo, São Paulo, Brazil;
2. Laboratory of Virology, Institute of Tropical Medicine, University of São Paulo, São Paulo, Brazil;
3. Department of Nephrology, School of Medicine, Irmandade Santa Casa de Misericórdia de São Paulo, São Paulo, Brazil;
4. Department of Stomatology, Division of General Pathology, School of Dentistry, University of São Paulo, São Paulo, Brazil