1. Department of Pediatrics, College of Medicine, The Ohio State University, Columbus, Ohio;
2. Departments of Medical Education and Pediatrics, College of Medicine, University of Illinois at Chicago, Chicago, Illinois;
3. Division of Emergency Medicine, Department of Pediatrics, University of Pittsburgh, Pittsburgh, Pennsylvania;
4. Department of Pediatrics, University of Cincinnati, Cincinnati, Ohio;
5. Department of Pediatrics, Duke University Medical Center, Durham, North Carolina;
6. Department of Medicine, College of Medicine, University of Arizona, Tucson, Arizona;
7. Depatrtment of Pediatrics, Johns Hopkins University, Baltimore, Maryland; and
8. Division of Neonatology, Department of Pediatrics, School of Medicine, University of Washington, Seattle, Washington