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Copenhagen: Munksgaard, 1970
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Ovid Technologies (Wolters Kluwer Health), 2003
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BMJ Publishing Group, 2004
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British Medical Association, 1972
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Hindawi Limited, 2009
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Hindawi Limited, 2009
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Hindawi Limited, 2009
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British Medical Association, 1987
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Ovid Technologies (Wolters Kluwer Health), 1975
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Ovid Technologies (Wolters Kluwer Health), 1974
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Elsevier BV, 1970
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Ovid Technologies (Wolters Kluwer Health), 1997
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British Medical Association, 1976
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Journal of Neurosurgery Publishing Group (JNSPG), 1975
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British Medical Association, 1975
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S. Karger AG, 2000
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Ovid Technologies (Wolters Kluwer Health), 1996
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Ovid Technologies (Wolters Kluwer Health), 1995
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Elsevier BV, 1993
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Springer Science and Business Media LLC, 1973