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Comparison of pre- and post-EFV switch neurometabolite levels measured by MRS in the anterior cingulate gyrus (ACG) or the posterior cingulate gyrus (PCG). Statistical comparison done by two-tailed paired t-test. A) GSH = glutathione, B) GABA/Cr = gamma-aminobutyric acid creatine ratio, C) Glx = glutamate + glutamine, D) Asp = aspartate.
