00434nas a2200145   4500000000100000000000100001008004100002100001400043700001400057700001300071700001400084245017600098300000700274490000700281       2018                            d1 aV. Walker1 aN. Davies1 aP. Kehoe1 aR. Martin00aWhat is the impact of regulatory guidance and expiry of drug patents on dementia drug prescriptions in England? A trend analysis in the Clinical Practice Research Datalink  a510 v10