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PubMed is the National Library of Medicine's (NLM) platform for searching MEDLINE.
Besides MEDLINE, PubMed also includes PubMed Central and Bookshelf.
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"MeSH (Medical Subject Headings) is the NLM controlled vocabulary thesaurus used for indexing articles for PubMed." -- NCBI. NLM. MeSH
MeSH consists of sets of terms naming descriptors in a hierarchical structure that permits searching at various levels of specificity. An advantage of controlled vocabularies, like MeSH, is that a single term has been used to represent a particular concept no matter how it was referred to in the original article.
What you need to know:
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