PubMed indexes articles using controlled vocabulry, Medical Subject Headings (MeSH). The search engine uses automatic term mapping to to map your search to the appropriate MeSH term. You can see the MeSH terms for an article in Abstract view. To start searching, just enter your search terms in the basic search box. You can check how your search was mapped in the "Details" box on the right dashboard in the result set. Advanced search and MeSH search options are also available.
PubMed comprises over 20 million citations for biomedical literature from MEDLINE, life science journals, and online books. PubMed citations and abstracts include the fields of medicine, nursing, dentistry, veterinary medicine, the health care system, and preclinical sciences. PubMed also provides access to additional relevant Web sites and links to the other NCBI molecular biology resources.
PubMed is a free resource that is developed and maintained by the National Center for Biotechnology Information (NCBI), at the U.S. National Library of Medicine (NLM), located at the National Institutes of Health (NIH).