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[London]: BMJ Publishing, 1998
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Springer Science and Business Media LLC, 1978
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Ovid Technologies (Wolters Kluwer Health), 1978
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Ovid Technologies (Wolters Kluwer Health), 1978
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Springer Science and Business Media LLC, 1991
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Springer Science and Business Media LLC, 1985
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Ovid Technologies (Wolters Kluwer Health), 1978
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Oxford University Press (OUP), 2005
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British Medical Association, 1993
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Elsevier BV, 1988
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Elsevier BV, 1986
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Elsevier BV, 1982
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Ovid Technologies (Wolters Kluwer Health), 1978
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Elsevier BV, 1978
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Ovid Technologies (Wolters Kluwer Health), 1978
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Ovid Technologies (Wolters Kluwer Health), 1978
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Ovid Technologies (Wolters Kluwer Health), 1978
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Elsevier BV, 1978
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British Medical Association, 1978
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Washington, DC, 1931 ; Online-Ausg., Chester, Vt: NewsBank, inc, 2007