[1] Royal Prince Alfred Hospital,Department of Trauma Services
[2] Sunnybrook and Women's Health Sciences Centre,Emergency Department
[3] Sunnybrook Campus,Department of Research Design and Biostatistics
[4] Institute for Clinical Evaluative Sciences,Department of Medicine, Division of Emergency Medicine
[5] Sunnybrook Campus,Department of Trauma Services
[6] University of Toronto,undefined
[7] Institute for Clinical Evaluative Sciences,undefined
[8] Royal Prince Alfred Hospital,undefined