1. Department of Oral Diagnosis Piracicaba Dental School Universidade Estadual de Campinas Piracicaba Brazil
2. Department of Oral Surgery, Pathology and Clinical Dentistry School of Dentistry Universidade Federal de Minas Gerais Belo Horizonte Brazil
3. Department of Oral Pathology School of Dentistry Universidade Federal do Rio Grande do Sul Porto Alegre Brazil
4. Molecular Pathology Area School of Dentistry Universidad de la República (UDELAR) Montevideo Uruguay
5. Diagnostic Centre for Oral Diseases School of Dentistry Universidade Federal de Pelotas Pelotas Brazil
6. Department of Oral Pathology School of Dentistry Universidade Federal do Rio Grande do Sul; Department of Oral MedicineHospital de Clínicas de Porto AlegreUniversidade Federal do Rio Grande do Sul Porto Alegre Brazil
7. Academic Unit of Oral and Maxillofacial Medicine and Pathology Department of Clinical Dentistry University of Sheffield Sheffield UK