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A, The mean number of activated voxels with a positive BOLD response. B, The mean number of activated voxels with a negative BOLD response at the 3 levels of sevoflurane anesthesia. C, The mean, peak ΔR2* from the positive BOLD. D, The mean, peak ΔR2* from the negative BOLD response at the 3 levels of sevoflurane anesthesia. The error bars indicate the standard error of the mean.
