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Effect of TNF-α (10 ng ml−1) on prednisolone-enhanced O2•− formation by (a) endothelium-intact whole pig PA segments and (b) cultured PAECs following a 16-h incubation. Data=mean±s.e.m.; n=6. *P<0.05, significantly increased compared to control. $P<0.05, significantly increased compared to prednisolone alone.
