National Library of Medicine
The National Library of Medicine (NLM) is the world’s largest medical library. It offers a free online searchable database, PubMed, which includes more than 15 million journal article references and abstracts. PubMed includes links to the full text of articles (which may require a fee) and other related resources. The NLM also offers a resource for the public called MedlinePlus, which includes links to self-help groups, NIH consumer-related organizations, health-related organizations and clinical trials.