1. Department of Pathology, School of Medicine, University of Sao Paulo, Sao Paulo, Brazil
2. Department of Otorhinolaryngology, School of Medicine, University of Sao Paulo, Sao Paulo, Brazil
3. Department of Stomatology, Division of Periodontology, School of Dentistry, University of Sao Paulo, Sao Paulo, Brazil
4. Department of Stomatology, Division of Oral Pathology, School of Dentistry, University of Sao Paulo, Sao Paulo, Brazil
5. Institute of Tropical Medicine of Sao Paulo, Department of Gastroenterology, LIM-07, University of Sao Paulo, Sao Paulo, Brazil
6. Department of Stomatology, Division of General Pathology, School of Dentistry, University of Sao Paulo, Sao Paulo, Brazil
7. Institue of Tropical Medicine of São Paulo, University of Sao Paulo, Sao Paulo, Brazil