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PubMed Overview
Last Updated: May 1, 2008
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PubMed, available via the NCBI Entrez retrieval system, was developed by the National Center for Biotechnology Information (NCBI) at the National Library of Medicine (NLM), located at the U.S. National Institutes of Health (NIH). Entrez is the text-based search and retrieval system used at NCBI for services including PubMed, Nucleotide and Protein Sequences, Protein Structures, Complete Genomes, Taxonomy, OMIM, and many others. PubMed provides access to citations from biomedical literature. LinkOut provides access to full-text articles at journal Web sites and other related Web resources. PubMed also provides access and links to the other Entrez molecular biology resources.
Publishers participating in PubMed electronically submit their citations to NCBI prior to or at the time of publication. If the publisher has a web site that offers full-text of its journals, PubMed provides links to that site as well as biological resources, consumer health information, research tools, and more. There may be a charge to access the text or information.
Use the Batch Citation Matcher to match citations to PubMed using bibliographic information such as journal, volume, issue, page number, and year, or the Entrez Programming Utilities that provide access to Entrez data outside of the regular Web query interface.
PubMed provides access to bibliographic information that includes MEDLINE, as well as:
For additional information, please see the NLM Fact Sheet: What's the Difference Between MEDLINE and PubMed?
MEDLINEIn Process Citations
PubMed's in-process records provide basic citation information and
abstracts before the citations are indexed with NLM's MeSH Terms and added to
MEDLINE. New in-process records are available in PubMed daily (Tuesday through
Saturday) and display with the tag [PubMed - in process].
Publisher-Supplied Citations
Citations received electronically from publishers appear in PubMed with the tag
[PubMed - as supplied by publisher]. New publisher supplied citations are
available in PubMed Tuesday through Saturday. Most of these progress to
"in-process" status and later to "indexed for MEDLINE" status. However,
not all citations will be indexed for MEDLINE and therefore will retain either
the tag [PubMed - as supplied by publisher] or [PubMed]. Publishers may submit
citations for articles that appear on the Web in advance of the journal issue's release.
These ahead-of-print citations also display the tag [Epub ahead of print].
The Journals Database can be searched by subject or by using the journal title, the Title Abbreviation, the NLM ID (NLM's unique journal identifier), the International Organization for Standardization (ISO) abbreviation, and the print and electronic International Standard Serial Numbers (pISSNs and eISSNs). The database includes journals in all Entrez databases (e.g., PubMed, Nucleotide, Protein).
Use the Single Citation Matcher for finding the citation for a particular article using title words or citation information, or to find an entire volume or issue of a journal, or to generate a bibliography by a first author.
The Batch Citation Matcher allows users to match their own list of citations to PubMed citations, using bibliographic information such as journal, volume, issue, page number, and year. The Citation Matcher returns the corresponding PMID. This number can then be used to easily link to PubMed. This service is frequently used by publishers or other database providers who want to link from bibliographic references on their Web sites directly to PubMed citations.