1. Head and Neck Service Department of Surgery Memorial Sloan Kettering Cancer Center New York New York
2. Department of Otorhinolaryngology Hospital de la Santa Creu i Sant PauUniversitat Autònoma de Barcelona Barcelona Spain
3. Department of Oncology, Radiotherapy, and Plastic Surgery Sechenov University, Bol’shaya Purogovskaya Ulitsa, 19c1 Moscow Russia