prospectively or retrospectively

См. также в других словарях:

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• cohort study — longitudinal study a systematic study of a group of people, which may be conducted prospectively or retrospectively. A prospective cohort study involves a systematic follow up for a defined period of time or until the occurrence of a specified… …   The new mediacal dictionary

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• The Keys to the White House — Infobox Book name = The Keys to the White House image caption = author = Allan Lichtman country = USA language = English subject = Political science publisher = Madison Books pub date = 1996 media type = Print (Hardcover) pages = 196 isbn = ISBN… …   Wikipedia