00479nas a2200181 4500000000100000008004100001100001500042700001300057700001700070700001400087700001400101700001700115700001400132245011900146300001000265490000800275022001400283 2012 d1 aI. Douglas1 aS. Evans1 aA. Hingorani1 aA. Grosso1 aA. Timmis1 aH. Hemingway1 aL. Smeeth00aClopidogrel and interaction with proton pump inhibitors: comparison between cohort and within person study designs ae43880 v345 a0959-8138