National Library of Medicine - Free Medline

• MEDLINEplus
  Find answers to your health questions
  
• MEDLINE/PubMed
  References and abstracts from 4300 biomedical journals
  
• ClinicalTrials.gov
  Provides information for patients about clinical research studies
  
• DIRLINE
  Directory of health organizations
  
• LOCATORplus
  Catalog of books, journals, and audiovisuals in the NLM collections
  
• NLM Gateway
  A single Web interface that searches multiple NLM retrieval systems
  
• PubMed Central
  A digital archive of life sciences journal literature
  
• MEDLINEplus.gov
  The consumer health site

Subscription-Based Services

• Medscape
  A leading medical information Web site for healthcare professionals. Users can access various subjects, based on their interests or needs -— from the latest medical news, to medical conference recaps, financial information, and medical texts.
  
• Knowledge Finder
  Full Medline database and a superb search engine, including plain language searches and relevance ordering of results. 30-day free trial period, then a $250 annual subscription fee. This link takes to you to their home page where you can register.

International Medline Links

• Healthwords ONLINE http://www.healthworks.co.uk - United Kingdom