1 Department of Head and Neck Surgery and Otolaryngology, Saitama Medical University International Medical Center, Hidaka, Saitama, Japan. [email protected].
2 Department of Head and Neck Surgery and Otolaryngology, Saitama Medical University International Medical Center, Hidaka, Saitama, Japan.
3 Department of Diagnostic Pathology, Saitama Medical University International Medical Center, Hidaka, Saitama, Japan.
4 Department of Respiratory Medicine, Saitama Medical University International Medical Center, Hidaka, Saitama, Japan.