title: Group and save traffic lights.
authors.affiliation: Royal Devon and Exeter Hospital, Exeter, UK. lawrence.kidd@nhs.net.
authors.forename: L R
authors.initials: LR
authors.lastname: Kidd
authors.affiliation: Royal Devon and Exeter Hospital, Exeter, UK.
authors.forename: H W
authors.initials: HW
authors.lastname: Corner
authors.affiliation: Royal Devon and Exeter Hospital, Exeter, UK.
authors.forename: D R
authors.initials: DR
authors.lastname: Johnston
mesh_terms: D000776:Anesthesiology / Q000379:methods*; D001803:Blood Transfusion; D006801:Humans; D019990:Perioperative Care