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Effect of different dose (1 or 10 IU) of botulinum toxin type A (BoNT/A) or boiled BoNT/A on pyloric circular muscle contractility. A: pyloric circular muscle contractility to electrical field stimulation (EFS). B: pyloric circular muscle contractility to acetylcholine chloride (ACh). Both doses caused similar changes in the pyloric sphincter responsiveness.
