[1] Univ Coll London Hosp, Surg Outcomes Res Ctr, London, England
[2] Natl Inst Acad Anaesthesia, Hlth Serv Res Ctr, London, England
[3] Royal Coll Anaesthetists, London, England
[4] Assoc Perioperat Practice, Harrogate, England
[5] Royal Natl Orthopaed Hosp, Patient Grp, Stanmore HA7 4LP, Middx, England
[6] Independent Canc Patients Voice, London, England
[7] Univ Southampton, Fac Med, Clin & Expt Sci, Integrat Physiol & Crit Illness Grp, Southampton SO9 5NH, Hants, England
[8] Southampton Univ Hosp, Southampton NIHR Resp Biomed Res Unit, Crit Care Res Area, Southampton, Hants, England
[9] John Radcliffe Hosp, Kangaroo Club, Oxford OX3 9DU, England
[10] Oesophageal Patients Assoc, Solihull, W Midlands, England
[11] AAGBI, London, England
[12] Royal Coll Surgeons England, London WC2A 3PN, England
[13] NIHR Evaluat Trials & Studies Coordinating Ctr, James Lind Alliance, Southampton, Hants, England