1. The Department of Pediatrics; Northwestern University Feinberg School of Medicine; Division of Emergency Medicine; Ann & Robert H. Lurie Children's Hospital of Chicago; Chicago IL
2. The Department of Pediatrics; University of Utah; Salt Lake City UT
3. The Department of Pediatrics; University of Cincinnati College of Medicine; James M. Anderson Center for Health Systems Excellence and Division of Emergency Medicine; Cincinnati Children's Hospital and Medical Center; Cincinnati OH
4. The Department of Pediatrics; Medical College of Wisconsin; Children's Research Institute; Milwaukee WI
5. The Division of Emergency Medicine; The Children's Hospital of Philadelphia; Philadelphia PA
6. The Department of Emergency Medicine; The University of Michigan Medical Center; Ann Arbor MI
7. The Division of Emergency Medicine; Children's National Medical Center; Washington DC