PubMed - Official Site PubMed comprises more than 28 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
PubMed PubMed® comprises more than 40 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
PMC Home PubMed Central ® (PMC) is a free full-text archive of biomedical and life sciences journal literature at the U S National Institutes of Health's National Library of Medicine (NIH NLM)