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The effects of bolus injections of 500 μl ACh (0.1 μM) and of 300 μl iopromide or iodixanol (both 100% v v−1) on perfusion pressure in isolated dog ear arteries constricted by PhE, in the absence and presence of either 100 μM L-NOARG alone or L-NOARG and 10 μM indomethacin (Indo). Bars marked with asterisks differ significantly from their respective controls (P<0.05).
