title: Systematic review did not consider problem of treatment effects.
authors: Su May
authors: SM
authors: Liew
authors: Jenny
authors: J
authors: Doust
authors: Paul
authors: P
authors: Glasziou
mesh_terms: D002318:Cardiovascular Diseases / Q000175:diagnosis* / Q000209:etiology*; D006801:Humans; D008962:Models, Theoretical