1. Department of Surgery, Head and Neck ServiceMemorial Sloan Kettering Cancer Center New York New York
2. Department of Radiation OncologyMemorial Sloan Kettering Cancer Center New York New York
3. Department of MedicineMemorial Sloan Kettering Cancer Center New York New York
4. Department of Oncology and Reconstructive SurgeryI.M. Sechenov First Moscow State Medical University Moscow Russia