1. Department of Cardiology and Clinical Examination (H.K., I.A., A.F., Y.I., S.K., T.O., S.S., T.T., K.M., K.K., M.M., M.F., S.Y., R.A., N.O., Y.N., H.A., T.S., K.A., Y.T., K.Y., M.N., N.T.)
2. and Department of Endocrinology, Metabolism, Rheumatology and Nephrology (K.G., K.A., T.M.)
3. Oita University Faculty of Medicine, Japan. Clinical Research Center for Diabetes, Tokushima University Hospital, Japan (H.T.).