About the Authors

Shinya Ishii

Affiliation Department of Geriatric Medicine, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan

Sumito Ogawa

Affiliation Department of Geriatric Medicine, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan

Masahiro Akishita

akishita-tky@umin.ac.jp

Affiliation Department of Geriatric Medicine, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: SI MA. Analyzed the data: SI. Wrote the paper: SI. Reviewed the manuscript and provided advice and suggestions: MA SO SI.