1. Department of Surgery, School of Medicine; Universidad de Antioquia, Clinica Vida/Instituto de Cancerología Las Americas; Medellin Colombia South America
2. Department of Head and Neck Surgery and Otorhinolaryngology; A.C. Camargo Cancer Center; Sao Paulo SP Brazil
3. Department of Head and Neck Oncology; Memorial Sloan Kettering Cancer Center; New York New York
4. Edinburgh University; Edinburgh Scotland
5. Department of Surgery; University of Chicago; Chicago Illinois
6. Department of Pathology, Division of Pathology/Laboratory Medicine; The University of Texas MD Anderson Cancer Center; Houston Texas
7. University of Udine School of Medicine; Udine Italy
8. Coordinator of the International Head and Neck Scientific Group