00504nas a2200157   4500000000100000000000100001008004100002100001700043700001300060700001700073700001600090245018900106300001100295490000800306022003200314       2009                            d1 aS. Rietbrock1 aJ. Plumb1 aA. Gallagher1 aT. van Staa00aHow effective are dose-adjusted warfarin and aspirin for the prevention of stroke in patients with chronic atrial fibrillation? An analysis of the UK General Practice Research Database  a527-340 v101  a0340-6245 (Print) 0340-6245