This version is made for bilingual teaching .Case-control study is an essential research design of Epidemiology, which involves identifying patients who have the outcome of interest (cases) and control patients who do not have that same outcome, and looking back to see if they had the exposure of interest. The exposure could be some environmental factor, a behavioural factor, or exposure to a drug or other therapeutic intervention
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《食品化学与营养学》课程教案（食品营养学部分）第四章 不同人群食品的营养要求
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