1. Royal Lancaster Infirmary; Lancaster Patient Safety Research Unit; Pointer Court 1, Ashton Road Lancaster UK LA1 4RP
2. Lancaster University; Lancaster Health Hub; Lancaster UK LA1 4YG
3. Royal Lancaster Infirmary; Department of Anaesthesia; Lancaster UK
4. National Institute for Health and Care Excellence; Level 1A, City Tower, Piccadilly Plaza Manchester UK M1 4BD
5. London School of Hygiene & Tropical Medicine; Cochrane Injuries Group; North Courtyard Keppel Street London UK WC1E 7HT