Takafumi Taguchi1, Takashi Karashima2, Yoshio Terada3. 1. Department of Endocrinology, Metabolism and Nephrology, Kochi Medical School, Kochi University, Kohasu, Oko-cho, Nankoku, 783-8505, Japan. tt27k5@orion.ocn.ne.jp. 2. Department of Urology, 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.