1. Laboratory of Oral Histopathology; Health Sciences Faculty; University of Brasília; Brasília Brazil
2. Hospital Sírio-Libanês; Brasília Brazil
3. Department of Oral Diagnosis; School of Dentistry; University of Campinas; Piracicaba São Paulo Brazil
4. Department of Dentistry; Brazilian Centre for Evidence-Based Research; Federal University of Santa Catarina; Florianopolis Brazil
5. School of Dentistry; Faculty of Medicine and Dentistry; University of Alberta; Edmonton AB Canada