[1] West Suffolk Hosp, Dept Anaesthesia & Peri Operat Med, Bury St Edmunds, Suffolk, England
[2] Oxford Univ Hosp NHS Fdn Trust, Nuffield Dept Anaesthet, Oxford, England
[3] Guys & St Thomas NHS Fdn Trust, Dept Anaesthesia, London, England
[4] Kings Coll London, London, England
[5] Royal Surrey Cty Hosp NHS Fdn Trust, Dept Anaesthesia & Pain Med, Guildford, Surrey, England
[6] Homi Bhabha Natl Inst, Tata Mem Ctr, Dept Anaesthesia Crit Care & Pain, Mumbai, Maharashtra, India
[7] Access Surg, Cambridge, England
[8] Royal Brompton & Harefield NHS Fdn Trust, Pain Management Serv Crit Care & Anaesthesia, London, England
[9] Martini Gen Hosp Groningen, Dept Anaesthesiol Pain Med & Procedural Sedat & A, Groningen, Netherlands
[10] Mayo Clin, Div Gynecol Oncol, Rochester, MN USA
[11] Bendigo Hlth, Victoria, Australia
[12] Univ Nottingham, Pain Ctr Versus Arthrit, Sch Pharm, Nottingham, England
[13] Stanford Univ, Dept Anesthesiol Peri Operat & Pain Med, Sch Med, Stanford, CA USA
[14] Vet Affairs Palo Alto Hlth Care Syst, Anesthesiol & Peri Operat Care Serv, Palo Alto, CA USA
[15] Univ Genoa, Dept Surg Sci & Integrated Diagnost, Genoa, Italy
[16] San Martino Policlin Hosp, IRCCS Oncol & Neurosci, Genoa, Italy
[17] Univ Penn, Anesthesiol & Crit Care Med, Perelman Sch Med, Philadelphia, PA 19104 USA
[18] Nottingham Univ Hosp NHS Trust, Nottingham Digest Dis Ctr, Gastrointestinal Surg, Natl Inst Hlth Res NIHR,Nottingham Biomed Res Ctr, Nottingham, England
[19] Univ Nottingham, Queens Med Ctr, Nottingham, England
[20] Univ Nottingham, MRC Versus Arthrit Ctr Musculoskeletal Ageing Res, David Greenfield Metab Physiol Unit, Sch Life Sci,Queens Med Ctr, Nottingham, England
[21] Royal Adelaide Hosp, Dept Anaesthesia Pain Med & Hyperbar Med, Adelaide, SA, Australia
[22] Univ Adelaide, Adelaide, SA, Australia