这个词是什么意思？
Studies in which subsets of a defined population are identified. These groups may or may not be exposed to factors hypothesized to influence the probability of the occurrence of a particular disease or other outcome. Cohorts are defined populations which, as a whole, are followed in an attempt to determine distinguishing subgroup characteristics.
中文名称索引；定义为 MeSH 英文原文，尚未逐条译审。MESH:D015331 · MeSH 2026。
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