TY - JOUR T1 - The quality of prescribing in primary care in England - observational study of the Drug Utilisation 90% indicator using administrative GP prescribing data JF - BMJ Open Y1 - 2021 A1 - Chiedozie, C A1 - Murphy, ME A1 - Fahey, T A1 - Moriarty, F VL - 11 IS - 3 ER -