Takafumi Taguchi1, Takeki Sugimoto2, Yoshio Terada3. 1. Department of Endocrinology, Metabolism and Nephrology, Kochi Medical School, Kochi University, Kohasu, Oko-cho, Nankoku, 783-8505, Japan. ttagu27k@axel.ocn.ne.jp. 2. Division of Community Medicine, Department of Surgery, Kochi Medical School, Kochi University, Nankoku, Japan. 3. Department of Endocrinology, Metabolism and Nephrology, Kochi Medical School, Kochi University, Kohasu, Oko-cho, Nankoku, 783-8505, Japan.