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2021
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Elsevier BV, 2007
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American Medical Association (AMA), 2006
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SAGE Publications, 2001
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SAGE Publications, 2001
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Wiley, 2018
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American Medical Association (AMA), 2016
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Elsevier BV, 2020
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Elsevier BV, 2010
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Hindawi Limited, 2007
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Ovid Technologies (Wolters Kluwer Health), 2018
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Elsevier BV, 2019
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American Medical Association (AMA), 2023
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Elsevier BV, 2023
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Springer Science and Business Media LLC, 2023
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American Medical Association (AMA), 2022
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California Digital Library (CDL), 2017
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American Medical Association (AMA), 2016
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Wiley, 2016
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Hindawi Limited, 2015