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Summary of Northern blot analyses showing the relative abundance of Flt-1 mRNA in lung tissue from animals exposed to >95% FiO2 for 24 or 48 hours (24h and 48h, respectively) compared with mRNA from lung tissue of control animals (C). Results were corrected for loading and normalized to control. There was a greater than 50% reduction in Flt-1 mRNA after 48 hours of exposure to hyperoxia. n = 6; *P < 0.05.
