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The effect of chronic pulmonary hypertension induced by hypoxia from birth for a period of 3 days on the response of isolated intrapulmonary arteries, with endothelium, to (a) ATP (n=4); (b) α,β-methyleneATP (n=3); (c) UTP (n=3), showing the mean response±s.e.mean, normal newborn, normal 3 day-old both with endothelium. *P<0.05.
