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Wien [u.a.]: Springer, 1990
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Ovid Technologies (Wolters Kluwer Health), 2003
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Journal of Neurosurgery Publishing Group (JNSPG), 2007
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Ovid Technologies (Wolters Kluwer Health), 1993
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Ovid Technologies (Wolters Kluwer Health), 1993
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Journal of Neurosurgery Publishing Group (JNSPG), 2004
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Elsevier BV, 1990
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Ovid Technologies (Wolters Kluwer Health), 2003
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Ovid Technologies (Wolters Kluwer Health), 1996
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Ovid Technologies (Wolters Kluwer Health), 1987
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Ovid Technologies (Wolters Kluwer Health), 2003
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Elsevier BV, 1997