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Elsevier BV, 1985
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SciELO Espana/Repisalud, 2007
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2007
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Kluwer Law International BV, 2006
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Kluwer Law International BV, 2005
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Ovid Technologies (Wolters Kluwer Health), 2002
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Ovid Technologies (Wolters Kluwer Health), 2000
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BMJ, 1973
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SAGE Publications, 1961
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SAGE Publications, 1961
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Elsevier BV, 2021
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Wiley, 2021
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Wiley, 2021
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Springer Science and Business Media LLC, 2020
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Elsevier BV, 2020
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Georg Thieme Verlag KG, 2019
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Georg Thieme Verlag KG, 2019
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Wiley, 2013
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Elsevier BV, 2011
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Wiley, 2011