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Tissue corrected GABA levles in the anterior cingulate cortex/medial prefrontal cortex were significantly lower in the shorter sleep duration group compared to the longer sleep duration group, after controlling for age, sex, and self-reported sleep quality (t = −2.21, p = 0.03). Error bars indicate standard error of means. GABA, gamma-aminobutyric acid; i.u., institutional unit
