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    BMJ. 2001 Jul 7;323(7303):42-6.

    Systematic reviews in health care: Assessing the quality of controlled clinical trials.

    Source

    Department of Social and Preventive Medicine, University of Bern, Bern, 3012 Switzerland.

    PMID:
    11440947
    [PubMed - indexed for MEDLINE]
    PMCID:
    PMC1120670
    Free PMC Article

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