1. Department of Emergency Medicine; UC Davis; Sacramento CA
2. Department of Emergency Medicine; Harbor-UCLA Torrance CA
3. University of California, Los Angeles; David Geffen School of Medicine; Los Angeles CA
4. Department of Emergency Medicine; Oregon Health & Science University; Portland OR
5. Department of Emergency Medicine; University of Iowa Hospitals and Clinics; Iowa City IA
6. Department of Emergency Medicine; UCLA Ronald Reagan/Olive View; Los Angeles CA