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Durham: Duke University Press, [1992] ; [Online-Ausgabe]
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Elsevier BV, 1995
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Ovid Technologies (Wolters Kluwer Health), 1994
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Ovid Technologies (Wolters Kluwer Health), 2009
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Massachusetts Medical Society, 2008
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Public Library of Science (PLoS), 2019
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American Diabetes Association, 2019
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American Medical Association (AMA), 2023