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Messenger RNA (mRNA) expression of β2 integrin, intracellular adhesion molecule 1 (ICAM-1), and αM integrin in normoxic (N) and hypoxic (H) rat lung tissue (n = 10 in each group). Data represent mean + SD mRNA expression normalized to geometric mean of mRNA expression of 3 housekeeping genes (GAPDH, β-actin, and HPRT). Triple asterisks indicate P < 0.001 versus normoxic lung and a single asterisk P < 0.02 versus normoxic lung.
