1. Asahikawa Medical University; Asahikawa Japan
2. Saitama Medical University; Saitama Japan
3. University of Toyama; Toyama Japan
4. St Luke's International Hospital; Tokyo Japan
5. Department of Diabetes, Endocrinology and Nutrition; Kyoto University Graduate School of Medicine; Kyoto Japan
6. Center for Public Health Sciences; National Cancer Center; Tokyo Japan
7. Department of Metabolic Medicine; Kumamoto University; Kumamoto Japan