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. Author manuscript; available in PMC: 2021 Aug 5.
Published in final edited form as: Otolaryngol Head Neck Surg. 2019 Apr 30;161(3):468–471. doi: 10.1177/0194599819846109

Figure 2.

Figure 2.

5-Hydroxytryptamine deficiency affected all 3 stages of swallowing. Lick rate was impaired earlier for TPH2−/− males. *P <.05. **P <.01. ***P ≤ .001. ns, nonsignificant; TPH2, tryptophan-hydroxylase-2. Error bars indicate standard error.