1. Department of Diabetes and Metabolic Diseases, Graduate School of Medicine; The University of Tokyo; Tokyo Japan
2. Department of Diabetes, Endocrinology and Nutrition, Graduate School of Medicine; Kyoto University; Kyoto Japan
3. Mitsubishi Tanabe Pharma Corporation, Sohyaku. Innovative research Division; Tokyo Japan
4. Mitsubishi Tanabe Pharma Corporation, Ikuyaku. Integrated Division; Tokyo Japan