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mRNA expression levels of (A) HIF-1α, (B) ET-1 and (C) ADM in the lung tissues from the various subgroups of newborn rats subjected to hypoxia or normoxia (n=8 per subgroup). Values are expressed as the mean ± standard deviation. *P<0.01, vs. respective control subgroup. HIF, hypoxia-inducible factor; ET, endothelin, ADM, adrenomedullin.
