1. Radiation Oncology
2. Head and Neck Surgery & Otorhinolaryngology
3. Anatomic Pathology, A.C. Camargo Cancer Center, São Paulo, Brazil
4. Department of Oral and Maxillofacial Surgery, Central University of Ecuador, Quito, Ecuador
5. Department of Oral Pathology, School of Dentistry and Rehabiliation Sciences, San Sebastian University, Santiago, Chile.