The National Library of Medicine’s search service, PubMed provides access to millions of citations and abstracts in MEDLINE, PreMEDLINE, and other related databases, with links to participating online journals. Click this link to access PubMed.

After typing and searching your search terms, you can apply additional filters on the left, such as choosing the type of articles.

Article type in PubMed

PubMed also has another feature called MeSH (Medical Subject Headings) Database where MeSH are terms that PubMed uses to tag articles with. While keywords are good for quick searching, MeSH are great for precise searching as well as finding established concepts, synonyms, and alternate spellings.

MeSH Database in PubMed
MeSH Example