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Ovid Technologies (Wolters Kluwer Health), 1999
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Elsevier BV, 1997
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Springer Science and Business Media LLC, 1997
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Springer Science and Business Media LLC, 1997
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Elsevier BV, 1996
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Ovid Technologies (Wolters Kluwer Health), 1996
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Ovid Technologies (Wolters Kluwer Health), 1996
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Ovid Technologies (Wolters Kluwer Health), 1995
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Springer Science and Business Media LLC, 1995
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Springer Science and Business Media LLC, 1995
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Wiley, 1994
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Springer Science and Business Media LLC, 1994
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Springer Science and Business Media LLC, 1994
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Elsevier BV, 1994
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Elsevier BV, 1994
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Elsevier BV, 1994
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Elsevier BV, 1993
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Elsevier BV, 1993
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Elsevier BV, 1992
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Biomedical Research Press, 1990