1. Department of Oral Diagnosis, School of Dentistry; University of Campinas; Piracicaba SP Brazil
2. Laboratory of Oral Histopathology, Health Sciences Faculty; University of Brasília; Brasília DF Brazil
3. School of Dentistry; University of Montes Claros; Montes Claros MG Brazil
4. Bahiana School of Medicine and Public Health; Salvador BA Brazil