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publishers/providers full-text online publisher of information in url subscription/membership/fee required Nature Publishing Group
aggregators author manuscript free resource Europe PubMed Central
aggregators full-text online subscription/membership/fee required Ovid Technologies, Inc.
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free resource Hazardous Substances Data Bank
free resource Hazardous Substances Data Bank
consumer health free resource MedlinePlus Health Information
consumer health free resource MedlinePlus Health Information
consumer health free resource MedlinePlus Health Information
organism-specific free resource Mouse Genome Informatics (MGI)
meta-databases free resource Pharmacogenomics Knowledge Base