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CBF mediating the relationship between serum ALT and working memory. (A) Scatter plot of the correlation between CBF in the right superior frontal gyrus and 3-back mean reaction time. (B) The mediation analysis between serum ALT level (X) and 3-back reaction time (Y), with CBF in the right superior frontal gyrus as the mediator (M). Path coefficients with p values (*p < 0.05 and **p < 0.01, respectively). Abbreviations: CBF, cerebral blood flow; ALT, alanine transaminase.
