00327nas a2200121   4500000000100000008004100001100002200042700001700064245009700081300000700178490000600185022001400191       2006                            d1 aS. Hernandez-Diaz1 aL. Rodriguez00aCardioprotective aspirin users and their excess risk of upper gastrointestinal complications  a220 v4  a1741-7015