1. Division of General Internal Medicine and the Center for Clinical Effectiveness, University of Cincinnati Medical Center, Cincinnati, Ohio
2. Division of Emergency Medicine, Cincinnati Children’s Hospital Medical Center, Cincinnati, Ohio
3. Department of Pediatrics, The University of Cincinnati College of Medicine, Cincinnati, Ohio
4. Department of Pediatrics, Johns Hopkins Medical Center, Baltimore, Maryland
5. Department of Pediatrics, Children's National Hospital, The George Washington University, Washington, DC