1. Department of Oral Diagnosis Piracicaba Dental School, University of Campinas Piracicaba Brazil
2. Service of Surgery and Oral Pathology João de Barros Barreto University Hospital, Universidade Federal do Pará Belém Brazil
3. Private Cytopathology Laboratory Natal Brazil
4. Department of Oral Surgery and Pathology Universidade Federal de Minas Gerais Belo Horizonte Brazil
5. Rheumatology Service Hospital das Clínicas, Universidade Federal de Minas Gerais Belo Horizonte Brazil