1. Division of Nephrology and Rheumatology, National Center for Child Health and Development, Tokyo, Japan
2. Department of Pediatrics, Yokohama City University Graduate School of Medicine, Yokohama, Japan
3. Department of Pediatrics, Kitasato University School of Medicine, Sagamihara, Japan
4. Tsukuba Gakuen Hospital, Tsukuba, Japan
5. Department of Nephrology, Tokyo Metropolitan Children’s Medical Center, Tokyo, Japan
6. Department of Pediatrics, Aijinkai Takatsuki General Hospital, Takatsuki, Japan
7. Department of Nephrology, Toho University Faculty of Medicine, Tokyo, Japan
8. Department of Pediatrics, National Hospital Organization Hokkaido Medical Center, Sapporo, Japan
9. Department of Pediatric Nephrology, Japanese Red Cross Nagoya Daini Hospital, Nagoya, Japan
10. Department of Child Health and Welfare (Pediatrics), Graduate School of Medicine, University of the Ryukyus, Nishihara-cho, Okinawa, Japan
11. Department of Pediatrics, Faculty of Life Sciences, Kumamoto University, Kumamoto, Japan
12. Department of Pediatrics, Fussa Hospital, Tokyo, Japan
13. Department of Pediatrics, Kobe University Graduate School of Medicine, Kobe, Japan
14. Clinical Research Center, Wakayama Medical University, Wakayama, Japan