[1] Aga Khan University, Department of Emergency Medicine, Karachi
[2] Sunnybrook Health Sciences Centre Research Institute, Toronto
[3] Institute for Clinical Evaluative Sciences, Toronto
[4] University of Toronto, Department of Surgery, Toronto
[5] John Hopkins University School of Medicine, Department of Surgery, Baltimore, MD
[6] Johns Hopkins Bloomberg School of Public Health, Johns Hopkins International Injury Research Unit, Department of International Health, Baltimore, MD
[7] Tulane University School of Public Health, Global Health Systems and Development, New Orleans, LA
[8] John Hopkins School of Medicine, Department of Emergency Medicine, Baltimore, MD