1. The Department of Emergency Medicine; University of California at San Francisco; San Francisco CA
2. The School of Medicine; University of California at San Francisco; San Francisco CA
3. The School of Medicine; Case Western Reserve University; Cleveland OH
4. Emergency Medical Services; American Medical Response; Santa Cruz CA
5. The Department of Pediatrics; University of Utah; Salt Lake City UT
6. The Department of Epidemiology and Biostatistics; University of California at San Francisco; San Francisco CA
7. The Dell School of Medicine; University of Texas; Austin TX