PubMed Central: government as publisher?
Gesensway
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D015510:Clinical Medicine / Q000639:trends; D006076:Government; D006801:Humans; D020407:Internet / Q000639:trends*; D016239:MEDLINE / Q000639:trends*; D009317:National Library of Medicine (U.S.) / Q000639:trends*; D010506:Periodicals as Topic / Q000639:trends; D011643:Publishing / Q000639:trends*; D014481:United States