1. Department of Head and Neck Surgery, Faculty of Medicine, University of São Paulo, São Paulo, SP, Brazil.
2. Department of Head and Neck Surgery, Hospital das Clínicas, Faculty of Medicine, University of São Paulo, São Paulo, SP, Brazil.
3. Instituto do Câncer do Estado de São Paulo (ICESP), SP, Brazil.
4. Metropolitan University of Santos, Medicine School, Santos, SP, Brazil