1. Division of Clinical Nephrology and Rheumatology, Niigata University Graduate School of Medical and Dental Sciences, Niigata 951-8120, Japan
2. Department of Pathology (I), Akita University School of Medicine, Akita 010-8543, Japan
3. Division of Thoracic and Cardiovascular Surgery, Niigata University Graduate School of Medical and Dental Sciences, Niigata 951-8120, Japan
4. Division of Cell Biology, Niigata University Graduate School of Medical and Dental Sciences, Niigata 951-8120, Japan
5. Division of Structural Pathology, Niigata University Graduate School of Medical and Dental Sciences, Niigata 951-8120, Japan
6. Division of Stem Cell Regulation Research, G6, Osaka University Medical School, Suita 565-0871, Japan