| Affiliation: | 1. Renal Electrolyte & Hypertension Division, Department of Medicine, University of Pennsylvania, , Philadelphia, PA;2. Department of Biostatistics and Epidemiology, Perelman School of Medicine, University of Pennsylvania, , Philadelphia, PA;3. Department of Statistics, Wharton School, University of Pennsylvania, , Philadelphia, PA;4. Center for Outcomes Research, The Children's Hospital of Philadelphia, , Philadelphia, PA;5. Division of Nephrology, Department of Medicine, University of Western Ontario, , London, Ontario, Canada;6. Departments of Pediatrics and Anesthesiology & Critical Care, University of Pennsylvania, , Philadelphia, PA |
