1. Department of Head and Neck Surgery, Aichi Cancer Center Hospital, Nagoya, Japan
2. Department of Otolaryngology-Head and Neck Surgery, Nagoya City University Graduate School of Medical Science, Nagoya, Japan
3. Department of Orthopedic Surgery, Aichi Cancer Center Hospital, Nagoya, Japan
4. Department of Clinical Oncology, Aichi Cancer Center Hospital, Nagoya, Japan
5. Department of Pathology and Molecular Diagnostics, Aichi Cancer Center Hospital, Nagoya, Japan
6. Department of Radiation Oncology, Aichi Cancer Center Hospital, Nagoya, Japan
7. Department of Head and Neck Surgery, Asahi University, Gifu, Japan.