1. From the Division of Pediatric Emergency Medicine
2. Department of Nephrology and Rheumatology
3. Department of General Pediatrics, Tokyo Metropolitan Children’s Medical Center, Tokyo, Japan
4. Biostatistics, Research Informatics, and
5. Pediatric Research in Emergency Therapeutics (PRETx) Program, Division of Emergency Medicine, Department of Pediatrics, University of British Columbia, BC Children’s Hospital Research Institute, Vancouver, British Columbia, Canada.