1 Royal United Hospital, Bath, UK. Electronic address: [email protected].
2 Department of Emergency Medicine, Virginia Commonwealth University, Richmond, VA, USA. Electronic address: [email protected].
3 Liverpool and Macquarie University Hospitals, Sydney, Australia; University of New South Wales, Sydney, Australia; University of Western Sydney, Sydney, Australia; Macquarie University, Sydney, Australia. Electronic address: [email protected].
4 University of Warwick, Warwick Medical School and Heart of England NHS Foundation Trust, Coventry CV4 7AL, UK. Electronic address: [email protected].