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    PLoS Med. 2008 Mar 11;5(3):e67. doi: 10.1371/journal.pmed.0050067.

    Observational research, randomised trials, and two views of medical science.

    Vandenbroucke JP.

    Source

    Royal Netherlands Academy of Arts and Sciences, and Department of Clinical Epidemiology, Leiden University Medical Centre, Leiden, The Netherlands. j.p.vandenbroucke@lumc.nl

    PMID:
    18336067
    [PubMed - indexed for MEDLINE]
    PMCID:
    PMC2265762
    Free PMC Article

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