Takefumi Kamakura
Department of Otorhinolaryngology-Head and Neck Surgery, Osaka University Graduate School of Medicine, Suita-city, Osaka, Japan
Tadashi Kitahara
Osaka Rosai Hospital, Sakai, Japan
Arata Horii
Department of Otolaryngology, Suita Municipal Hospital
Hidenori Inohara
Department of Otorhinolaryngology-Head and Neck Surgery, Osaka University Graduate School of Medicine (