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Positive and negative functional connectivity (FC) maps of the left DLPFC in healthy controls and surgery patients. A, Healthy controls. B, Surgery patients at baseline. C, Surgery patients on day 7 after cardiac surgery. D, Surgery patients on day 30 after cardiac surgery. The statistical threshold was P < 0.05. Colour bar indicates the t-value. DLPFC indicates dorsolateral prefrontal cortex.
