1. Section of Hospital Medicine, Department of Pediatrics, Children's Hospital Colorado University of Colorado Aurora Colorado USA
2. Department of Pediatrics, Division of Pediatric Emergency Medicine, Ann and Robert H. Lurie Children's Hospital of Chicago Northwestern University Feinberg School of Medicine Chicago Illinois USA
3. Adult and Child Consortium for Health Outcomes Research and Delivery Science University of Colorado Aurora Colorado USA
4. Department of Biostatistics and Informatics, Colorado School of Public Health University of Colorado Aurora Colorado USA
5. Section of Emergency Medicine, Department of Pediatrics, Children's Hospital Colorado University of Colorado Aurora Colorado USA
6. Cincinnati Children's Hospital Medical Center and the University of Cincinnati College of Medicine Cincinnati Ohio USA