Nur zur Vollständigkeit (Sie werden es alle schon wissen):
Based on PubMed Central (PMC), the US National Institutes of Health free digital archive of biomedical and life sciences journal literature, (http://ukpmc.ac.uk/) UK PubMed Central (UKPMC) provides a stable, permanent, and free-to-access online digital archive of full-text, peer-reviewed research publications. UKPMC is part of a network of PMC International (PMCI) repositories. (http://www.pubmedcentral.nih.gov/about/pmci.html) PMCI is a collaborative effort between the US National Library of Medicine (NLM), the publishers whose journal content makes up the PMC archive (including the Journal of the Medical Library Association), and organizations in other countries that share NLM’s interest in archiving life sciences literature. (from MLA-FOCUS 11/1/2007)