1. Head and Neck Department; European Institute of Oncology; Milan Italy
2. Plastic Reconstructive Surgery Department; European Institute of Oncology; Milan Italy
3. Head and Neck Department; Ospedale di Bolzano; Bolzano Italy
4. Department of Otorhinolaryngology; The University of Oklahoma Health Sciences Center; Oklahoma City Oklahoma
5. Department Otorhinolaryngology-Head and Neck Surgery; Centro de Tratamento e Pesquisa Hospital do Cancer A.C. Camargo; São Paulo Brazil
6. Head and Neck Service; MSKCC; New York New York