1. Department of Endocrinology and Metabolism Kanazawa University Graduate School of Medical Sciences Kanazawa Ishikawa Japan
2. Department of Hygiene and Public Health Faculty of Medicine Institute of Medical, Pharmaceutical and Health Sciences Kanazawa University Kanazawa Ishikawa Japan
3. Division of Community and Family Medicine Jichi Medical University Shimotsuke Tochigi Japan
4. Department of Diabetes, Metabolism and Endocrinology Ichikawa Hospital International University of Health and Welfare Ichikawa Chiba Japan
5. Department of Endocrinology, Metabolism and Hypertension Research Clinical Research Institute National Hospital Organization Kyoto Medical Center Kyoto Japan
6. Department of Metabolic Syndrome and Nutritional Science Research Institute of Environmental Medicine Nagoya University Nagoya Aichi Japan