1. Department of Internal Medicine, University of Tsukuba Institute of Clinical Medicine, Tsukuba, Japan
2. Department of Biostatistics, Epidemiology and Preventive Health Sciences, University of Tokyo, Tokyo, Japan
3. Training Department of Administrative Dietician, Shikoku University, Tokushima, Japan
4. Department of Internal Medicine and Therapeutics, Osaka University Graduate School of Medicine, Osaka, Japan
5. Department of Endocrinology and Metabolism, Jichi Medical College, Tochigi, Japan
6. Fourth Department of Medicine, Saitama Medical School, Saitama, Japan
7. Department of Internal Medicine, Chiba University Graduate School of Medicine, Chiba, Japan
8. Tama-Hokubu Medical Center, Tokyo, Japan
9. Institute for Adult Diseases Asahi Life Foundation, Tokyo, Japan