1. Department of Pediatrics, George Washington University School of Medicine, Washington, DC; Divisions of
2. Emergency Medicine
3. Critical Care Medicine, Children's National Medical Center, Washington, DC
4. Department of Pediatrics, University of California School of Medicine, Davis, California
5. Center for Health Services and Community Research, Washington, DC
6. Children's Research Institute, Washington, DC
7. Center for Hospital-Based Specialties, Washington, DC