1. Department of Medicine and Bioregulatory Science, Graduate School of Medical Sciences, Kyushu University , Fukuoka 812-8582 , Japan
2. Department of Medical Education, School of Medicine, California University of Science and Medicine , Colton, CA 92324 , USA
3. Department of Pharmacology and Toxicology and Medicine, University of Mississippi Medical Center , Jackson, MS 39216 , USA
4. Medical Education Center, Keio University School of Medicine , Tokyo 160-8582 , Japan
5. Department of Biochemistry, Keio University School of Medicine , Tokyo 160-8582 , Japan
6. Department of Uro-Oncology, Saitama Medical University International Medical Center , Saitama 350-1298 , Japan
7. Department of Urology, Keio University School of Medicine Tokyo 160-8582 , Japan
8. Department of Computational Biology and Medical Sciences, Graduate School of Frontier Sciences, The University of Tokyo , Chiba 277-0882 , Japan
9. Department of Microbiology, Faculty of Medicine, Saitama Medical University , Saitama 350-0495 , Japan