title: Association and causation in epidemiology - half a century since the publication of Bradford Hill's interpretational guidance.
authors.affiliation: Centre for Occupational and Environmental Health, Institute of Population Health, The University of Manchester, Manchester, UK richard.wakeford@manchester.ac.uk.
authors.forename: Richard
authors.initials: R
authors.lastname: Wakeford
mesh_terms: D015982:Bias; D015984:Causality; D015986:Confounding Factors, Epidemiologic; D003627:Data Interpretation, Statistical; D015981:Epidemiologic Factors; D004813:Epidemiology / Q000266:history*; D049673:History, 20th Century; D006801:Humans