1. Department of Oral Pathology, School of Dentistry Federal University of Rio Grande do Sul Porto Alegre Brazil
2. Department of Oral Diagnosis, Piracicaba Dental School Campinas University Piracicaba Brazil
3. Molecular Pathology Area, School of Dentistry Universidad de la República Montevideo Uruguay
4. Academic Unit of Oral and Maxillofacial Medicine and Pathology, Department of Clinical Dentistry University of Sheffield Sheffield UK
5. Dental School Rio de Janeiro State University Rio de Janeiro Brazil
6. Department of Oral Pathology, School of Dentistry Federal University of Bahia Salvador Brazil