PubMed

The PubMed search system provides access to the PubMed database of bibliographic information, which is drawn primarily from MEDLINE and PREMEDLINE.  In addition, for participating journals that are indexed selectively for MEDLINE, PubMed includes all articles from that journal, not just those that are included in MEDLINE.  Finally, PubMed also provides access to the molecular biology databases included in NCBI's Entrez retrieval system. It is expected that access to additional National Library of Medicine databases will be added in the future.  PubMed is updated quarterly and covers the period 1966 to the present.

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