Center for Fundamental Education, Teikyo University of Science, Tokyo 120-0045, Japan. Research & Development Division, Mitsui Sugar Co., Ltd., Tokyo 103-8423, Japan. Department of Tokyo Judo Therapy, Teikyo University of Science, Tokyo 120-0045, Japan. Department of School Education, Teikyo University of Science, Tokyo 120-0045, Japan. Harvard PKD Center for Polycystic Kidney Disease Research, Boston, MA 02115, USA. Faculty of Medicine, Nara Medical University, Nara 634-8521, Japan.