1. Oral Pathology, Department of Oral Diagnosis and Pathology, School of Dentistry; Federal University of Rio de Janeiro (UFRJ); Rio de Janeiro Brazil
2. Oral Pathology, School of Dentistry; State University of Rio de Janeiro (UERJ); Rio de Janeiro Brazil
3. Oral Pathology, Department of Oral Diagnosis, Piracicaba Dental School; University of Campinas (FOP-UNICAMP); Piracicaba Brazil
4. Pathology Section; Centro Clínico de Cabeza y Cuello/Hospital Herrera Llerandi; Guatemala City Guatemala