1 Department of Diabetes and Endocrinology, Gifu University Graduate School of Medicine, Gifu 501-1194, Japan.
2 Yutaka Seino Distinguished Center for Diabetes Research, Kansai Electric Power Medical Research Institute, Kobe 650-0017, Japan.
3 Division of Molecular and Metabolic Medicine, Department of Physiology and Cell Biology, Kobe University Graduate School of Medicine, Kobe 650-0017, Japan.