1. Department of Diabetes and Metabolic Diseases, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan.
2. PRESTO, Japan Science and Technology Agency, Kawaguchi, Japan.
3. Department of Molecular Sciences on Diabetes, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan.
4. Diabetes Research Center, Research Institute, National Center for Global Health and Medicine, Tokyo, Japan.
5. CREST, Japan Science and Technology Agency, Kawaguchi, Japan.