1. Department of Head and Neck Surgery and Otorhinolaryngology; A.C. Camargo Cancer Center; São Paulo Brazil
2. Department of Oral Diagnosis; School of Dentistry, State University of Campinas; Piracicaba São Paulo Brazil
3. Department of Dentistry; Federal University of Rio Grande do Norte; Natal-RN Brazil
4. Department of Pathology; A.C. Camargo Cancer Center; São Paulo Brazil
5. Laboratório Nacional de Biociências; Centro Nacional de Pesquisa em Energia e Materiais; Campinas SP Brazil
6. Department of Diagnostics and Oral Medicine; Institute of Dentistry and Oulu University Hospital, University of Oulu, and Institute of Dentistry, University of Helsinki; Finland