1. From the Department of Emergency Medicine University of California at San Francisco School of Medicine San Francisco CA USA
2. the Department of Emergency Medicine University of California at San Diego School of Medicine San Diego CA USA
3. the Department of Emergency Medicine Cooper Medical School of Rowan University Camden NJ USA
4. the Section of Emergency Medicine Louisiana State University Health Sciences Center New Orleans LA USA
5. the Department of Emergency Medicine UCSF‐Fresno Medical Education Program Fresno CA USA
6. Academic Research Systems University of California San Francisco CA USA
7. and the Department of Emergency Medicine University of California at Los Angeles School of Medicine Los Angeles CA USA