Nikko Kinen Hospital, Department of Otorhinolaryngology, Hokkaido, Japan; Asahikawa Medical University, Department of Otolaryngology-Head and Neck Surgery, Hokkaido, Japan
Takumi Kumai
Asahikawa Medical University, Department of Otolaryngology-Head and Neck Surgery, Hokkaido, Japan; Asahikawa Medical University, Department of Innovative Head & Neck Cancer Research and Treatment (IHNCRT), Hokkaido, Japan; Corresponding author.
Tomohiko Michizuka
Nikko Kinen Hospital, Department of Otorhinolaryngology, Hokkaido, Japan
Takashi Osaki
Nikko Kinen Hospital, Department of Otorhinolaryngology, Hokkaido, Japan
