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Berlin: Erich Schmidt, 2002
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Springer Science and Business Media LLC, 1996
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Springer Science and Business Media LLC, 1996
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Springer Science and Business Media LLC, 1999
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Springer Science and Business Media LLC, 2002
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Ovid Technologies (Wolters Kluwer Health), 1991
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Ovid Technologies (Wolters Kluwer Health), 1991
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BMJ, 1996