1. Oral Diagnosis Department, Piracicaba Dental School University of Campinas (UNICAMP) Piracicaba Brazil
2. Department of Pathology, Faculty of Medical Sciences University of Campinas (UNICAMP) Campinas Brazil
3. Department of Head and Neck Surgery and Otorhinolaryngology A. C. Camargo Cancer Center São Paulo Brazil
4. Head and Neck Surgery Department, Medical School University of São Paulo São Paulo Brazil