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Contractile responses to electrical field stimulation. Detrusor strips from wild-type (a) and W/Wv (b) animals contracted in response to electrical field stimulation applied for 10 s at frequencies of 1, 2, 4, 8 and 16 Hz; pulse width durations of 0.3 ms. All contractions were abolished in the presence of tetrodotoxin (TTX) (0.5 µmol·L−1).
