About the Authors

Hiroyuki Sakai

hirosaka@tokyo-med.ac.jp

Affiliation Department of Diabetes, Endocrinology and Metabolism, Tokyo Medical University, Tokyo, Japan

Hidenori Nagao

Affiliation Pharmacokinetics Research Department of ASKA Pharmaceutical Co., Ltd., Kawasaki, Kanagawa, Japan

Mamoru Sakurai

Affiliation Department of Diabetes, Endocrinology and Metabolism, Tokyo Medical University, Tokyo, Japan

Takako Okumura

Affiliation Department of Diabetes, Endocrinology and Metabolism, Tokyo Medical University, Tokyo, Japan

Yoshiyuki Nagai

Affiliation Department of Diabetes, Endocrinology and Metabolism, Tokyo Medical University, Tokyo, Japan

Junpei Shikuma

Affiliation Department of Diabetes, Endocrinology and Metabolism, Tokyo Medical University, Tokyo, Japan

Rokuro Ito

Affiliation Department of Diabetes, Endocrinology and Metabolism, Tokyo Medical University, Tokyo, Japan

Tetsuya Imazu

Affiliation Pharmacokinetics Research Department of ASKA Pharmaceutical Co., Ltd., Kawasaki, Kanagawa, Japan

Takashi Miwa

Affiliation Department of Diabetes, Endocrinology and Metabolism, Tokyo Medical University, Tokyo, Japan

Masato Odawara

Affiliation Department of Diabetes, Endocrinology and Metabolism, Tokyo Medical University, Tokyo, Japan

Competing Interests

The authors declare that ASKA Pharmaceutical Co., Ltd. provided support in the form of salaries for authors HN and TI. This does not alter the authors' adherence to PLOS ONE policies on sharing data and materials.

Author Contributions

Conceived and designed the experiments: HS HN MO. Performed the experiments: HN TI MS HS. Analyzed the data: MS TM YN. Contributed reagents/materials/analysis tools: HN JS RI. Wrote the paper: HS HN TO.