1. Department of Stomatology, Area of Pathology, Bauru School of Dentistry, University of São Paulo, Bauru, Brazil
2. Department of Computing, School of Sciences, São Paulo State University (UNESP), Bauru, Brazil
3. Adolfo Lutz Institute, Pathology Division, São Paulo, Brazil
4. Department of Head and Neck Surgery, Fundação Pio XII – Cancer Hospital of Barretos, Barretos, São Paulo, Brazil
5. Department of Head and Neck Surgery and Otorhinolaryngology, Cancer Hospital A. C. Camargo, São Paulo, Brazil