1. Nephrology Center, Toranomon Hospital, Tokyo, Japan;
2. Okinaka Memorial Institute for Medical Research, Tokyo, Japan;
3. Department of Pathology, Toranomon Hospital, Tokyo, Japan;
4. Department of Pathology, Yokohama City Hospital, Kanagawa, Japan;
5. Department of Nephrology, Kyoto University Graduate School of Medicine, Kyoto, Japan