National Library of Medicine -- Government site form National Library of Medicine using PubMed and Internet Grateful Med as free systems that search MEDLINE.

MD Consult -- A pay for service comprehensive site from journal watch, drug updates and weekly overview of what patients read in popular press. Full-text articles are available.

HealthWeb -- Collaborative project of health sciences libraries of Greater Midwest Region of the National Network of Libraries of Medicine and Committee for Institutional Cooperation which provides links to evaluated non-commercial health related Internet resources.

MDChoice -- Every month an editorial board of academic physicians evaluates and reviews medical content from the Web.

OncoLink -- Anything related to cancer for use by both physicians and patients.

PSI Group -- Doctors’ guide to the Internet with links to the latest medical news, new medical sites, new drugs or indications and medical conferences.

NLM Gateway Search -- Gateway to MEDLINE/PubMed, OLDMEDLINE, LOCATORplus, MEDLINEplus, DIRLINE, AIDS Meetings, Health Services Research Meetings, Space Life Sciences Meetings, and HSRProj.

ClinicalTrials.gov -- A listing of over 4000 clinical trials mostly sponsored by the NIH.

American College of Preventive Medicine (ACPM) -- American College of Preventive Medicine -- Screening policy statements.

National Guideline Clearinghouse -- A public resource for evidence-based clinical practice guidelines.