1. Department of Cardiovascular, Renal and Metabolic Medicine Sapporo Medical University School of Medicine Sapporo Japan
2. Department of Immunology and Microbiology National Defense Medical College Tokorozawa Japan
3. Department of Health Checkup and Promotion Keijinkai Maruyama Clinic Sapporo Japan
4. Department of Public Health Sapporo Medical University School of Medicine Sapporo Japan