No abstract available
MeSH terms
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Anesthesia / adverse effects*
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Anesthetics, Inhalation / adverse effects*
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Female
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Humans
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Middle Aged
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Nitrous Oxide / adverse effects*
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Spinal Cord Diseases / chemically induced*
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Vitamin B 12 Deficiency / complications
Substances
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Anesthetics, Inhalation
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Nitrous Oxide