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    BMJ. 1998 Jan 3;316(7124):61-6.

    Bias in location and selection of studies.

    Source

    Department of Social Medicine, University of Bristol. m.egger@bristol.ac.uk

    PMID:
    9451274
    [PubMed - indexed for MEDLINE]
    PMCID:
    PMC2665334
    Free PMC Article

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