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PubMed is a free database including primarily the MEDLINE database of references and abstracts on life sciences and biomedical topics. The United States National Library of Medicine (NLM) at the National Institutes of Health maintains the database as part of the Entrez system of information retrieval.
Databases and search engines differ substantially in terms of coverage and retrieval qualities. [1] Users need to account for qualities and limitations of databases and search engines, especially those searching systematically for records such as in systematic reviews or meta-analyses. [2]
PubMed is an excellent starting point for locating peer-reviewed medical literature reviews on humans from the last five years. It offers a free search engine for accessing the MEDLINE database of biomedical research articles offered by the National Library of Medicine at the U.S. National Institutes of Health. [32]
PubMed Central is the designated repository for papers submitted in accordance with the NIH Public Access Policy and for those that fall under similar policies from other funding agencies. [ 12 ] By April 2014, the NIH had increased enforcement of compliance with its Public Access Policy by delaying continuing grant payments for noncompliance.
PubMed Central is a free digital archive of full articles, accessible to anyone from anywhere via a web browser (with varying provisions for reuse). Conversely, although PubMed is a searchable database of biomedical citations and abstracts, the full-text article resides elsewhere (in print or online, free or behind a subscriber paywall).
Open Journal Systems (OJS) was conceived to facilitate the development of open access, peer-reviewed publishing, providing the technical infrastructure for the presentation of journal articles along with an editorial-management workflow, including article submission, peer-review, and indexing. OJS relies upon individuals fulfilling different ...
Engines designed to search MEDLINE (such as Entrez and PubMed) generally use a Boolean expression combining MeSH terms, words in the abstract and title of the article, author names, date of publication, etc. Entrez and PubMed can also find articles similar to a given one based on a mathematical scoring system that takes into account the ...
It is a common misconception that because a source appears in PubMed it is published by, or has the approval of, the National Institutes of Health (NIH), National Center for Biotechnology Information (NCBI), or the US government. These organisations support the search engine but lend no particular weight to the content it indexes.