1. Department of Oral Diagnosis Piracicaba Dental School State University of Campinas Piracicaba Brazil
2. Department of Oral Pathology School of Dentistry Federal University of Rio Grande do Sul Porto Alegre Brazil
3. Laboratory of Oral Histopathology Health Sciences Faculty University of Brasília Brasília Brazil
4. Dental Oncology Service São Paulo State Cancer Institute School of Medicine University of São Paulo São Paulo Brazil
5. Boldrini Children’s Center São Paulo Brazil
6. Department of Head and Neck Surgery and Otorhinolaryngology AC Camargo Cancer Center São Paulo Brazil
7. Department of Head and Neck Surgery School of Medicine University of São Paulo São Paulo Brazil
8. Unit of Oral & Maxillofacial Pathology School of Clinical Dentistry University of Sheffield Sheffield UK