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iNOS mRNA expression by real time reverse transcription-polymerase chain reaction (RT-PCR) in the control group and 6 hr, 24 hr, 72 hr after contusion injury. The relative amounts of iNOS mRNA shows noticeable changes with time. At 6 hr post-SCI, the increase in the level of iNOS mRNA was prominent, especially in the caudal side.
