1. aDepartment of Pediatrics, University of Maryland School of Medicine, Baltimore, Maryland
2. bDepartment of Health Policy and Management, University of Maryland School of Public Health, College Park, Maryland
3. cDepartment of Pediatrics, Robert Larner, MD, College of Medicine, University of Vermont, Burlington, Vermont
4. dDepartments of Emergency Medicine and Pediatrics, University of Florida College of Medicine – Jacksonville, Jacksonville, Florida
5. eDepartment of Pediatrics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania
6. fDepartment of Pediatrics, Northwestern University Feinberg School of Medicine, Chicago, Illinois
7. gDepartment of Emergency Medicine, University of California, Davis, Sacramento, California