1. From the Center for Policy and Research in Emergency Medicine Department of Emergency Medicine Oregon Heath & Science University Portland OR
2. Department of Biostatistics University of California Los Angeles CA
3. Department of Emergency Medicine University of Rochester Rochester NY
4. Department of Emergency Medicine William Beaumont Hospital–Troy Troy MI
5. Department of Emergency Medicine Brigham & Women’s Hospital Boston MA
6. Department of Emergency Medicine The Ohio State University Wexner Medical Center Columbus OH
7. Department of Emergency Medicine William Beaumont Hospital–Royal Oak Royal Oak MI
8. Department of Emergency Medicine University of Texas‐Southwestern Dallas TX
9. Department of Emergency Medicine Thomas Jefferson University Hospital Philadelphia PA
10. Department of Emergency Medicine Wake Forest School of Medicine Winston Salem NC
11. Department of Emergency Medicine UC Davis School of Medicine Sacramento CA
12. Department of Emergency Medicine University of Wisconsin–Madison Madison WI
13. Department of Emergency Medicine Northeast Ohio Medical University Rootstown OH
14. Department of Emergency Medicine Vanderbilt University Medical Center Nashville TN
15. and the Department of Emergency Medicine University of Pennsylvania Philadelphia PA