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 University of Campinas Piracicaba Brazil
3. Molecular Pathology Area, School of Dentistry Universidad de la República (UDELAR) Montevideo Uruguay
4. Department of Oral Medicine Hospital de Clínicas de Porto Alegre (HCPA/UFRGS) Porto Alegre Brazil
5. Department of Clinical Dentistry, Academic Unit of Oral and Maxillofacial Medicine and Pathology University of Sheffield Sheffield UK