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    JAMA. 1993 Dec 1;270(21):2598-601.

    Users' guides to the medical literature. II. How to use an article about therapy or prevention. A. Are the results of the study valid? Evidence-Based Medicine Working Group.

    Source

    Department of Medicine, McMaster University, Hamilton, Ontario, Canada.

    PMID:
    8230645
    [PubMed - indexed for MEDLINE]

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