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    Chest. 2009 Jul;136(1):304-5.

    Update on Registration of Clinical Trials in ClinicalTrials.gov.

    Source

    Lister Hill National Center for Biomedical Communications, National Library of Medicine, National Institutes of Health, Bethesda, MD 20894, USA.

    PMID:
    19584213
    [PubMed - indexed for MEDLINE]
    PMCID:
    PMC2821288
    Free PMC Article

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