[1] Aga Khan University, Department of Emergency Medicine, Karachi
[2] Sunnybrook Health Sciences Centre Research Institute, Toronto, ON
[3] Institute for Clinical Evaluative Sciences, Toronto, ON
[4] University of Toronto, Department of Surgery, Toronto, ON
[5] Johns Hopkins Bloomberg School of Public Health, Johns Hopkins International Injury Research Unit, Department of International Health, Baltimore, MD
[6] Shifa International Hospital, Department of Emergency Medicine, Islamabad
[7] John Hopkins School of Medicine, Department of Emergency Medicine, Baltimore, MD