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GABA in the CSF of healthy controls (HC, n=21) and (FEP, n=41) patients. Each point represents the concentration of a single CSF sample and the horizontal lines represent the median for each group. Statistical differences between controls and FEP patients were determined using Mann–Whitney U-test. *P<0.05. CSF, cerebrospinal fluid; FEP, first-episode psychosis; GABA, γ-aminobutyric acid.
