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The lower cervical and upper thoracic cords of 117 rats were exposed to single doses of 2,500 to 4,500 R in air or 100% O2 at 1 and 3 ATA. Myelitis developed in all animals within 3 1/2 to 9 3/4 months. A 14% oxygen enhancement effect was seen at 2,500 R; this decreased until 3,500 R, after which no significant difference could be detected.
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Asbell et al. (1971) studied this question.
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