1. Department of Cardiovascular, Renal and Metabolic Medicine Sapporo Medical University School of Medicine Sapporo Japan
2. Tanaka Medical Clinic Sapporo Japan
3. Department of General Medicine Sapporo Medical University School of Medicine Sapporo Japan
4. Department of Public Health Sapporo Medical University School of Medicine Sapporo Japan
5. Department of Health Checkup and Promotion Keijinkai Maruyama Clinic Sapporo Japan