[1] Erasmus MC, Dept Publ Hlth, Ctr Med Decis Making, Rotterdam, Netherlands
[2] Monash Univ, Alfred Hosp, Natl Trauma Res Inst, Ctr Excellence Traumat Brain Injury Res, Melbourne, Vic 3181, Australia
[3] Australian Satellite Cochrane EPOC Grp, Melbourne, Vic, Australia
[4] Univ Manchester, Univ Sheffield, Emergency Med, Sheffield, S Yorkshire, England
[5] Salford Royal Hosp NHS Fdn Trust, Sheffield, S Yorkshire, England