00355nas a2200133   4500000000100000008004100001100001700042700002200059700001300081700001500094700001400109245008400123022001400207       2019                            d1 aB. Dickerman1 aX. Garcia-Albeniz1 aR. Logan1 aS. Denaxas1 aM. Hernan00aAvoidable flaws in observational analyses: an application to statins and cancer  a1078-8956