Affiliation: | 1. Department of Oral Diagnosis, Piracicaba Dental School, State University of Campinas, Piracicaba, S?o Paulo, Brazil;2. Department of Pathology, Federal University of Santa Catarina, Florianopólis, Santa Catarina, Brazil;3. Department of Pathology, AC Camargo Cancer Centre, S?o Paulo, S?o Paulo, Brazil;4. Department of Head and Neck Surgery and Otorhinolaryngology, AC Camargo Cancer Centre, S?o Paulo, S?o Paulo, Brazil |