About the Authors

Hitoshi Ishii

hit@tenriyorozu.jp

Affiliation Department of Endocrinology, Tenri Hospital, Tenri, Nara, Japan

Yasuhiko Iwamoto

Affiliation Tokyo Women’s Medical University, Shinjuku-ku, Tokyo, Japan

Naoko Tajima

Affiliation Jikei University School of Medicine, Minato-ku, Tokyo, Japan

Competing Interests

All the authors have received honoraria from Novo Nordisk Pharma Ltd. This does not alter the authors' adherence to all the PLoS ONE policies on sharing data and materials.

Author Contributions

Conceived and designed the experiments: HI YI NT. Performed the experiments: HI YI NT. Analyzed the data: HI YI NT. Contributed reagents/materials/analysis tools: HI. Wrote the paper: HI.