1. Center for Translational Research in Oncology, Instituto do Cancer do Estado de Sao Paulo, Hospital das Clinicas da Faculdade de Medicina da Universidade de Sao Paulo Sao Paulo Brazil
2. Department of Bioscience and Oral Diagnosis São Paulo State University (UNESP) São Paulo Brazil
3. Centro Clínico de Cabeza y Cuello Guatemala City Guatemala
4. Department of Pathology and Forensic Medicine Ribeirao Preto Medical School, Universidade de São Paulo Ribeirao Preto Brazil
5. Department of Otorhinolaryngology and Head and Neck Surgery Sao Paulo Federal University Sao Paulo Brazil
6. Department of Radiology and Oncology Faculdade de Medicina Universidade de São Paulo São Paulo Brazil