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Contraction of the human corpus cavernosum induced by infusion of noradrenaline (10 μM) into the perfusion fluid under control conditions, in the presence of EFS, and in the presence of EFS and l-NOARG (300 μM) as indicated. Noradrenaline infusion is shown by arrows. EFS and l-NOARG are shown by separate horizontal bars. The mechanogram is an original recording of the responses of one preparation and is representative of all experiments in this series (n = 4).
