1. Stromatology Department and Post-Graduate Program in Dentistry, Federal University of Paraná, Curitiba, Paraná, Brazil.
2. Private Practice, Curitiba, Paraná, Brazil.
3. Oral Pathology Laboratory, University Positivo, Curitiba, Paraná, Brazil.
4. Oral Medicine, State University of Ponta Grossa, Ponta Grossa, Paraná, Brazil.
5. Clinical and Preventative Dentistry Department, Federal University of Pernambuco, Recife, Pernambuco, Brazil.