1. Department of Community Medicine, Nagasaki University Graduate School of Biomedical Science, Nagasaki, Japan
2. Department of Cardiovascular Disease Prevention, Osaka Center for Cancer and Cardiovascular Disease Prevention, Osaka, Japan
3. Research and Clinical Center for Yusho and Dioxin, Kyusyu University, Fukuoka, . Japan
4. Department of Island and Community Medicine, Nagasaki University Graduate School of Biomedical Science, Nagasaki, Japan