[1] Great Ormond St Hosp NHS Fdn Trust, Dept Paediat Anaesthesia, London, England
[2] Assoc Anaesthetists, London, England
[3] Univ Coll London NHS Fdn Trust, Dept Haematol, London, England
[4] NHS Blood & Transplant, London, England
[5] Guys & St Thomas NHS Fdn Trust, Dept Haematol, London, England
[6] Barts Hlth NHS Trust, Dept Anaesthesia, London, England
[7] Univ Coll London NHS Fdn Trust, Dept Anaesthesia, London, England
[8] Great Ormond St Hosp NHS Trust, Dept Paediat Anaesthesia, London, England
[9] Assoc Paediat Anaesthetists Great Britain & Irela, London, England
[10] Guys & StThomasNHS Fdn Trust, Dept Orthopaed Surg, London, England
[11] Kings Coll Hosp NHS Fdn Trust, Dept Anaesthesia, Dept Crit Care Med, London, England
[12] Worcestershire Acute Hosp NHS Trust UK, Dept Anaesthesia, Worcester, England
[13] Assoc Anaesthetists Trainee Comm, London, England
[14] Manchester Univ NHS Fdn Trust, Dept Anaesthesia, Manchester, Lancs, England
[15] Royal Coll Anaesthetists, London, England
[16] Univ Hosp Leicester NHS Trust, Dept Anaesthesia, Leicester, Leics, England
[17] Obstetr Anaesthetists Assoc, London, England