Mitsuhiro Aoki1, Hiroshi Okuda2, Natsuko Obara2, Hideki Mori3
Departments of 1Otolaryngology and 3Diagnostic Pathology, Ogaki Tokushukai Hospital; 2Department of Otolaryngology-Head and Neck Surgery, Gifu University Graduate School of Medicine, Ogaki City, Gifu, Japan.