Adherence to antibiotic guidelines and reported penicillin allergy: pooled cohort data on prescribing and allergy documentation from two English National Health Service (NHS) trusts - Phillips, CJ; Gilchrist, M; Cooke, FJ; Franklin, BD; Enoch, DA; Murphy, ME; Santos, R; Brannigan, ET; Holmes, AH (BMJ Open, 2019)