1. Department of Cardiovascular, Renal and Metabolic Medicine Sapporo Medical University School of Medicine Sapporo Japan
2. Department of General Medicine Sapporo Medical University School of Medicine Sapporo Japan
3. Department of Public Health Sapporo Medical University School of Medicine Sapporo Japan
4. Sanwa Kagaku Kenkyusho Co., Ltd Mie Japan
5. Division of Medical and Behavioral Subjects Department of Nursing Sapporo Medical University School of Health Sciences Sapporo Japan
6. Japan Health Care College Sapporo Japan