[1] Univ Aberdeen, Hlth Serv Res Unit, Aberdeen, Scotland
[2] Univ Alabama Birmingham, Dept Surg, Div Trauma & Acute Care Surg, Birmingham, AL 35294 USA
[3] Univ Aberdeen, Hlth Econ Res Unit, Aberdeen, Scotland
[4] Royal London Hosp, London, England
[5] Univ Aberdeen, Med Stat Team, Aberdeen, Scotland
[6] Queen Mary Univ London, Blizard Inst, London, England
[7] Univ Sheffield, Sch Hlth & Related Res, Sheffield, England
[8] Queens Med Ctr, Nottingham, England
[9] Mayo Clin, Coll Med & Sci, Rochester, MN USA
[10] Univ Edinburgh, Edinburgh, Scotland
[11] Univ Strathclyde, Law Sch, Glasgow, Scotland
[12] Barts Hlth NHS Trust, London, England
[13] Patient & Publ Involvement Representat, London, England