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Glutamate and GABA concentration levels are shown on the y-axes for healthy controls, low-hallucinating patients (AVH-), and high-hallucinating patients (AVH+) in the 4 brain regions. Error bars indicate standard error. * indicates significant post hoc comparisons at P < .05, conducted to explore the significant interaction of Group and Region. STG, superior temporal gyrus; IFG, inferior frontal gyrus; ACC, anterior cingulate cortex; IU, institutional units.
