literature

• MedLine (National Library of Medicine bibliographic database)
• more than 12 million references to articles from more than 4600 journals, roughly half of them including abstract (?)
• 2000 completed references are added daily
• each record contains the title, authors, MeSH indexing terms, etc., but does not contain the full text.

• PubMed
• Pubmed is the core reference for life sciences professionals

PubMed (which encompasses Medline) is the database of choice, for researchers and clinicians alike, to locate relevant articles and, in many cases, link directly to a publisher's site for the full text.

• PubMed is the NLM Web system that provides access to MEDLINE as well as a dozen other databases. (?)
• only abstracts available
• the database of citations and abstracts to biomedical and other life science journal literature.

• PubMed Central :
• an electronic archive of full text journal articles, offering unrestricted access to its contents. Every full text article in PubMed Central has a corresponding entry in PubMed.
• PubMed Central follows in the footsteps of other highly successful and useful services that NCBI has developed for the worldwide scientific community

• BioMed Central BioMed Central is an independent publishing house committed to providing immediate free access to peer-reviewed biomedical research