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Effect of clonidine (30 μM) on the spontaneous outflow of noradrenaline (NA) and adrenaline (AD) from the adrenal medulla of wild-type mice. Clonidine was present from the beginning of superfusion. Results are presented as percentage of NA or AD adrenal content per minute. Columns and vertical lines represent mean±s.e.m. of six assays. *Significantly different from the values of the spontaneous outflow of NA; P<0.05. #Significantly different from corresponding control values P<0.05.
