1. Oral Diagnosis Department, Semiology and Pathology; Piracicaba Dental School; University of Campinas (UNICAMP); Piracicaba São Paulo Brazil
2. Service of Oral Pathology; João de Barros Barreto University Hospital; Federal University of Pará; Belém Pará Brazil
3. Medical School; Clinics Hospital; University of São Paulo; São Paulo São Paulo Brazil
4. Department of Oral Pathology and Oral Biology; School of Dentistry; Faculty of Health Sciences; University of Pretoria; Pretoria South Africa