1. Division of Pediatric Emergency Medicine, Department of Pediatrics, and
2. Department of Orthopaedic Surgery, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania;
3. Division of Pediatric Emergency Medicine, Department of Pediatrics, Medical College of Wisconsin, Milwaukee, Wisconsin
4. Departments of Pediatrics, and Psychiatry and Behavioral Sciences, The George Washington University School of Medicine, Washington, District of Columbia; and