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Basal and acetylcholine-dependent release of prostaglandins (PGI2, PGE2, thromboxane A2 and PGF2α) in aortic rings, with and without endothelium, of WKY and SHR. Data are shown as mean±s.e.m. of at least four different experiments. The * indicates a significant effect of acetylcholine and # a significant difference between WKY and SHR.
