1. Department of Pediatric Nephrology; Tokyo Women's Medical University School of Medicine; Tokyo; Japan
2. Department of Urology; Tokyo Women's Medical University School of Medicine; Tokyo; Japan
3. Kidney Center; Tokyo Women's Medical University School of Medicine; Tokyo; Japan
4. Department of Pathology; Tokyo Women's Medical University School of Medicine; Tokyo; Japan
5. Department of Medicine IV; Tokyo Women's Medical University School of Medicine; Tokyo; Japan
6. Department of Pathology; Toukai University School of Medicine; Tokyo; Japan
7. Yamaguchi's Pathology Laboratory; Chiba; Japan