About the Authors

Shiori Otsuki

Affiliations Graduate School of Medicine, The University of Tokyo, Tokyo, Japan, CREST, Japan Science and Technology Agency, Saitama, Japan

Hiroshi Nishiura

nishiurah@med.hokudai.ac.jp

Affiliations Graduate School of Medicine, The University of Tokyo, Tokyo, Japan, CREST, Japan Science and Technology Agency, Saitama, Japan, Graduate School of Medicine, Hokkaido University, Sapporo, Japan

Competing Interests

We declare that co-author H. Nishiura is PLOS ONE Editorial Board member. This does not alter the authors' adherence to all the PLOS ONE policies on sharing data and materials. Apart from this membership, we declare that we have no conflicts of interest.

Author Contributions

Conceptualization: HN. Data curation: HN SO. Formal analysis: HN SO. Funding acquisition: HN. Investigation: HN. Methodology: HN. Project administration: HN. Resources: SO. Software: HN. Supervision: HN. Validation: HN SO. Visualization: SO. Writing – original draft: HN SO. Writing – review & editing: HN SO.