1. Division of Emergency Medicine; Children's National Medical Center; Washington DC
2. Department of Pediatrics; George Washington University; Washington DC
3. Department of Emergency Medicine; George Washington University; Washington DC
4. Division of Infectious Disease; Department of Pediatrics; University of Utah; Salt Lake City UT
5. Department of Pediatrics; Children's Hospital of Philadelphia; University of Pennsylvania; Philadelphia PA
6. Department of Pediatrics; Johns Hopkins Children's Center; The Johns Hopkins University; Baltimore MD
7. Division of Infectious Disease; Children's Hospital of Philadelphia; University of Pennsylvania; Philadelphia PA