1. Department of Oral Surgery and Pathology, School of Dentistry Universidade Federal de Minas Gerais Belo Horizonte Brazil
2. Service of Oral Pathology João de Barros Barreto University Hospital, Federal University of Pará Belém Brazil
3. Department of Oral Pathology and Oral Biology University of Pretoria Pretoria South Africa
4. Department of Oral and Maxillofacial Surgery Queen Alexandra Hospital Portsmouth UK
5. Department of Oral Diagnosis, Piracicaba Dental School University of Campinas Piracicaba Brazil