1. Department of Endocrinology, Metabolism, and Nephrology (Y.T., M.T., M.N., T.T., M.O., S.N., M.K., Y.T.), Kochi Medical School, Kochi University, Nankoku 783-8505, Japan
2. Department of Health Care Center (Y.I.), Kochi University, Kochi 780-8520, Japan
3. Department of Hosogi Hospital (K.H.), Kochi 780-8535, Japan