1. Department of Pediatric, Tsuchiura Kyodo General Hospital
2. Department of Pediatric, Tokyo Medical and Dental University Hospital
3. Department of Pediatric, Nerima Hikarigaoka Hospital
4. Division of Nephrology and Rheumatology, National Center for Child Health and Development
5. Department of Nephrology, Tokyo Medical and Dental University Hospital
6. Department of Pathology, Tokyo Metropolitan Children’s Medical Center