title: Efficiency of use of blood for surgery in south and mid Wales.
mesh_terms: D001771:Blood Banks; D001788:Blood Grouping and Crossmatching; D001803:Blood Transfusion / Q000706:statistics & numerical data*; D004526:Efficiency; D006761:Hospitals; D006801:Humans; D013514:Surgical Procedures, Operative; D014852:Wales