1. aDepartment of Pediatrics, Children’s Mercy Hospital, University of Missouri-Kansas City, Kansas City, Missouri
2. bChildren’s Hospital Association, Lenexa, Kansas
3. cDivision of General Pediatrics and Adolescent Medicine
4. dDivision of Emergency Medicine, Department of Pediatrics, Emory University School of Medicine and Children's Healthcare of Atlanta, Atlanta, Georgia
5. eChildren’s National Hospital, George Washington University, Washington, District of Columbia