00397nas a2200157   4500000000100000000000100001008004100002100001600043700001600059700001500075700001900090245009700109300001200206490000700218022001400225       2018                            d1 aL. McDonald1 aA. Schultze1 aR. Carroll1 aS. Ramagopalan00aPerforming studies using the UK Clinical Practice Research Datalink: to link or not to link?  a601-6050 v33  a0393-2990