1. Department of Emergency Medicine; University of Colorado Hospital; Aurora CO
2. Department of Emergency Medicine; Hospital of the University of Pennsylvania; Philadelphia PA
3. Department of Emergency Medicine; Boston University Medical Center; Boston MA
4. Department of Radiology; Boston University Medical Center; Boston MA
5. Department of Emergency Medicine; University of Pittsburgh Medical Center; Pittsburgh PA
6. Department of Emergency Medicine; George Washington University School of Medicine; Washington DC
7. Department of Emergency Medicine; Lehigh Valley Health Network; Allentown PA
8. Department Sports, Orthopedics, and Emergency Imaging; University of Texas Health Science Center at Houston; Houston TX
9. Department of Imaging Physics; Division of Diagnostic Imaging; The University of Texas MD Anderson Cancer Center; Houston TX
10. Department of Emergency Medicine; University of California San Francisco/San Francisco General Hospital; San Francisco CA