1 Department of Oral Pathology, João de Barros Barreto University Hospital, Federal University of Pará, Belém, Pará, Brazil.
2 Oral Diagnosis Department, Oral Pathology Area, Piracicaba Dental School, University of Campinas (UNICAMP), Piracicaba, São Paulo, Brazil.
3 Department of Oral Pathology, João de Barros Barreto University Hospital, Federal University of Pará, Belém, Pará, Brazil; Oral Diagnosis Department, Oral Pathology Area, Piracicaba Dental School, University of Campinas (UNICAMP), Piracicaba, São Paulo, Brazil.
4 Oral Diagnosis Department, Oral Pathology Area, Piracicaba Dental School, University of Campinas (UNICAMP), Piracicaba, São Paulo, Brazil. Electronic address: Ciro.dss@gmail.com.