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Observational etiologic research

Part 4—Matching in case-control studies: almost always a bad idea

Authors

  • Rutger A. Middelburg,

    Corresponding author
    1. Center for Clinical Transfusion Research, Sanquin Research, Leiden, The Netherlands
    2. Jon J. van Rood Center for Clinical Transfusion Research, Leiden University Medical Center, Leiden, The Netherlands
    3. Department of Clinical Epidemiology, Leiden University Medical Center, Leiden, The Netherlands
    • Address reprint requests to: Rutger A. Middelburg, Center for Clinical Transfusion Research, Sanquin Research, Plesmanlaan 1a, 2333 BZ Leiden, The Netherlands; e-mail: R.A.Middelburg@lumc.nl.

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  • Johanna C. Wiersum-Osselton,

    1. TRIP (Transfusion Reactions in Patients) Dutch National Hemovigilance Office, The Hague, The Netherlands
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  • Leo M.G. van de Watering,

    1. Center for Clinical Transfusion Research, Sanquin Research, Leiden, The Netherlands
    2. Jon J. van Rood Center for Clinical Transfusion Research, Leiden University Medical Center, Leiden, The Netherlands
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  • Johanna G. van der Bom

    1. Center for Clinical Transfusion Research, Sanquin Research, Leiden, The Netherlands
    2. Jon J. van Rood Center for Clinical Transfusion Research, Leiden University Medical Center, Leiden, The Netherlands
    3. Department of Clinical Epidemiology, Leiden University Medical Center, Leiden, The Netherlands
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