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前瞻性队列研究
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前瞻性队列研究
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前瞻性队列研究
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prospective cohort study
前瞻性队列研究
根据研究对象现时的暴露状况(是否暴露/不同暴露水平)分组,以现在为起点追踪将来待研究结局的方法。是队列研究最基本的形式,又称随访研究、即时性队列研究。
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soil,earth
soil ecological stoichiometry
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