1. Department of Public Health; Kobe University Graduate School of Health Sciences, 7-10-2 Tomogaoka, Suma-ku; Kobe Hyogo 654-0142 Japan
2. Cardiovascular stroke Renal Project (CRP); Kobe Japan
3. Educational Corporation Tukushi Gakuen, 2-3-11 Takadai; Chitose Hokkaido 066-0035 Japan