About the Authors

Masana Yokoya

m.yokoya@shimonoseki-jc.ac.jp

Affiliation Shimonoseki Junior College, 1-1 Sakurayama-cho, Shimonoseki, Yamaguchi, Japan

Hideyasu Shimizu

Affiliation Toshiwa-kai Hospital, 5-8-1 Kanayama, Naka-ku, Nagoya, Japan

Yukito Higuchi

Affiliation Kyushu Kyoritsu University, 1-8 Jiyugaoka, Yahatanishi-ku, Kitakyushu, Japan

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: MY HS YH. Performed the experiments: MY. Analyzed the data: MY. Contributed reagents/materials/analysis tools: MY. Wrote the paper: MY.