1. Department of Otolaryngology - Head and Neck Surgery, Mount Sinai School of Medicine, New York, New York, USA
2. University of Udine, Udine, Italy
3. Head and Neck Service, Memorial Sloan-Kettering Cancer Center, New York, New York, USA
4. Department of Otolaryngology - Head and Neck Surgery, The Chaim Sheba Medical Center, Tel-Hashomer, Israel
5. Division of Otolaryngology, SIU School of Medicine, Springfield, Illinois, USA
6. Department of Head and Neck Surgery, Royal Marsden Hospital, London, UK