1. Division of Pediatric Emergency Medicine, Children's Hospital of Philadelphia, and
2. Department of Pediatrics, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania;
3. Department of Emergency Medicine,
4. Division of General Internal Medicine, Department of Medicine, and
5. Center for Health Equity Research and Promotion, VA Pittsburgh Healthcare System, Pittsburgh, Pennsylvania
6. Division of Pediatric Emergency Medicine, Department of Pediatrics, School of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania; and