1. Divisions of Critical Care Medicine,
2. Departments of Internal Medicine,
3. Pediatrics and
4. Public Health, School of Medicine, George Washington University, Washington, DC;
5. Informatics,
6. Health Services Research, and
7. Department of Informatics, Child Health Corporation of America, Shawnee Mission, Kansas;
8. Clinical Effectiveness, Children's National Medical Center, Washington, DC;
9. Divisions of General Pediatrics and
10. Infectious Diseases, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, and
11. Departments of Pediatrics and
12. Biostatistics and Epidemiology and
13. Center for Clinical Epidemiology and Biostatistics, School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania