1. Department of Nephrology, Hiroshima University Hospital, 1-2-3 Kasumi, Minami-ku, Hiroshima 734-8551, Japan
2. Department of Stem Cell Biology and Medicine, Graduate School of Biomedical & Health Sciences, Hiroshima University, 1-2-3 Kasumi, Minami-ku, Hiroshima 734-8553, Japan
3. TWOCELLS Company, Limited, 16-35 Hijiyama-honmachi, Minami-ku, Hiroshima 732-0816, Japan