PubMed comprises more than 37 million citations for biomedical literature from MEDLINE, life science journals, and online books. Citations may include links to full-text content from PubMed Central and publisher web sites. MEDLINE (Medical Literature Analysis and Retrieval System Online) is the largest component of PubMed and consists primarily of journal citations; articles indexed with MeSH (Medical Subject Headings) and curated with funding, genetic, chemical and other metadata.
EMBASE contains references to journal articles in biomedicine. The references consist of authors, title, journal data, abstract and keywords. EMBASE contains European literature, and coverage in the field of drug research, pharmacology and pharmaceutics. The database can be searched back to 1974.
