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A cohort study is a type of observational research design used in epidemiology and biostatistics to investigate the causes of disease and to establish links between risk factors and health outcomes. It involves identifying a group of individuals (the cohort) who are initially free from the outcome of interest and then following them over a period of time to observe whether or _____ ________ _______ ____ _________ ______ _________ ___ _____ _________ _________ ___.
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