title: Interaction: A word with two meanings creates confusion.
authors.forename: Anders
authors.initials: A
authors.lastname: Ahlbom
authors.forename: Lars
authors.initials: L
authors.lastname: Alfredsson
mesh_terms: D003627:Data Interpretation, Statistical; D015340:Epidemiologic Research Design; D006801:Humans; D015233:Models, Statistical; D012044:Regression Analysis; D012307:Risk Factors; D009626:Terminology as Topic