PubMed
http://www.ncbi.nlm.nih.gov/PubMed/fulltext.html
Links to 506 journals which are included in the Medline database.These journals usually contain the full-text of the original article, but this is not always the case. It varies by publisher and journal. User registration, a subscription fee, or some other type of fee may be required to access the full text of articles in some journals. In these cases, follow access instructions provided on the journal's Web page. Policies vary by publisher and by journal. This list is sorted alphabetically by journal title. The links provided are to the home page of the Web-based journal.
 

The American Journal of Clinical Nutrition
http://www.ajcn.org
 

JAMA – Journal of the American Medical Association
http://www.jama.ama-assn.org
 

New England Journal of Medicine Online
http://www.nejm.org
 

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