1 Department of Emergency Medicine, Queen's University, Canada. Electronic address: epurdy@qmed.ca.
2 Royal Surrey County Hospital, UK. Electronic address: sbattrawden@doctors.org.uk.
3 Emergency Medicine, Kaiser Permanente, Northern California, United States.
4 Department of Medicine, Division of Emergency Medicine, Western University, Canada; Department of Pediatrics, Division of Pediatric Emergency Medicine, McMaster University, Canada.
5 Division of Emergency Medicine, Departments of Medicine and Pediatrics, McMaster University, Canada. Electronic address: pardhaa@mcmaster.ca.
6 Department of Anesthesia, McMaster University, Canada. Electronic address: ssharda@haltonheathcare.com.
7 Division of Hematology and Thromboembolism, Departments of Medicine and Pathology and Molecular Medicine, McMaster University, Canada. Electronic address: mpai@mcmaster.ca.