[1] Univ Warwick, Warwick Med Sch, Div Hlth Sci, Warwick Res Nursing, Coventry, England
[2] Univ Oxford, Oxford Trauma Res & Emergency Care, Kadoorie, NDORMS, Oxford, England
[3] Oxford Univ Hosp NHS Fdn Trust, John Radcliffe Hosp, Major Trauma Unit, Oxford, England
[4] Univ Toronto, Off Res & Innovat, North York Gen Hosp, Toronto Ontario Inst Hlth Policy Management & Eva, Toronto, ON, Canada
[5] Univ Warwick, Warwick Med Sch, Clin Trials Unit, Warwick, England
[6] Univ Hosp Birmingham NHS Fdn Trust, Crit Care Unit, Birmingham, England
[7] Univ Hosp Coventry & Warwickshire, Clifford Bridge Rd, Coventry CV2 2DX, England