zkowski, M.D.; Demetrios J. Sahlas, M.D.; Heather Murray, M.D.; Ariane MacKey, M.D.; Steven Verreault, M.D.; George A. Wells, Ph.D.; Dar Dowlatshashi, M.D., Ph.D.; Grant Stotts, M.D.; Ian G. Stiell, M.D., M.Sc.; and Mukul Sharma, M.D., M.Sc., co-senior author. Author disclosures are on the manuscript.