Links to literature resources that are freely available to all.

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BioPortal is a web accessible open repository of biomedical ontologies. Users may browse, search and visualize ontologies, as well as participate in the evaluation and evolution of ontology reviews by adding notes, corrections, reviews, etc. Data from other sources such as GEO, ClinicalTrials.gov and ArrayExpress may also be integrated with the ontologies.
This content is being maintained by whetzel.

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CCancer is an automatically collected database of gene lists reported in various studies. The current coverage is 3369 gene lists from 2644 papers. Enrichment analysis reports intersecting gene lists with an inputted gene list.

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The Directory of Open Access Journals provides a listing of open-access journals and a searchable database of article abstracts from them. It aims to incorporate journals from all subjects and languages.
links directory index: not available
| Title | Publication Year | Google Scholar Citation Count |

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The Public Library of Science (PLoS) is a non-profit organization of scientists and physicians committed to making the world\'s scientific and medical literature a freely available public resource.
links directory index: not available
| Title | Publication Year | Google Scholar Citation Count |