About the Authors

Maiko Miyagawa

Affiliation Department of Otorhinolaryngology, Shinshu University School of Medicine, Matsumoto, Japan

Shin-ya Nishio

Affiliation Department of Otorhinolaryngology, Shinshu University School of Medicine, Matsumoto, Japan

Shin-ichi Usami

usami@shinshu-u.ac.jp

Affiliation Department of Otorhinolaryngology, Shinshu University School of Medicine, Matsumoto, Japan

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: SU. Performed the experiments: MM SN. Analyzed the data: MM SN. Wrote the paper: MM SU.