About the Authors

Sayaka Saito


Affiliation Department of Primary Care and Medical Education, Graduate School of Comprehensive Human Sciences, University of Tsukuba, Ibaraki, Japan

Kei Mukohara

Affiliation Department of General Medicine, National Hospital Organization Nagasaki Medical Center, Nagasaki, Japan

Yasushi Miyata

Affiliation Department of General Internal Medicine, Rumoi Municipal Hospital, Hokkaido, Japan

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: SS KM YM. Performed the experiments: KM. Analyzed the data: SS KM YM. Contributed reagents/materials/analysis tools: SS KM YM. Wrote the paper: SS.