1. Royal Lancaster Infirmary; Lancaster Patient Safety Research Unit; Pointer Court 1, Ashton Road Lancaster UK LA1 4RP
2. Lancaster Medical School; Lancaster UK LA1 4YG
3. National Institute for Health and Care Excellence; Level 1A, City Tower, Piccadilly Plaza Manchester UK M1 4BD
4. Royal Lancaster Infirmary; Department of Anaesthesia; Ashton Road Lancaster Lancashire UK LA1 4RP