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. 2020 Sep 8;11:564457. doi: 10.3389/fphar.2020.564457

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Copyright © 2020 Czajkowska and Całka

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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The graphs show the percentage of the neurons vasoactive intestinal polypeptide (VIP)-IR, substance P (SP)-IR, neuronal nitric oxide synthase (nNOS)-IR, galanin (GAL)-IR, pituitary adenylate cyclase-activating polypeptide (PACAP)-IR and cocaine- and amphetamine-regulated transcript (CART)-IR in the myenteric plexuses (A), outer submucosal plexuses (B) and inner submucosal plexuses (C) in porcine duodenum in the control (gray bar) and experimental (white bar) groups. *p < 0.05, **p < 0.01, ***p < 0.001 indicates differences in the expression of individual test substances compared to control pigs.