Journal of Neurogastroenterology and Motility : eISSN 2093-0887 / pISSN 2093-0879

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Fig. 3. Effects of acute administration of codeine on the frequency of esophageal primary peristalsis. Codeine significantly increased the frequency of normal primary contraction was significantly higher after codeine treatment, and the frequencies of weak and failed contractions were significantly lower after codeine treatment compared with placebo treatment.
J Neurogastroenterol Motil 2024;30:38~45
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