aUnit of Preventive Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, JapanbGraduate School of Education, Nagasaki University, Nagasaki, JapancDepartment of Endocrinology and Metabolism, Sasebo City General Hospital, Sasebo, JapandCenter for Health and Community Medicine, Nagasaki University, Nagasaki, JapaneDepartment of Cardiovascular Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, JapanfDepartment of Endocrinology and Metabolism, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, JapangUnit of Community Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan.