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Correlation analysis between disease duration (years) and the ALFF values in the PCUN and ACC. (A) Correlation analysis between disease duration and the ALFF values in the PCUN: n = 20, r = 0.254, p > 0.05. (B) Correlation analysis between disease duration and the ALFF values in the ACC: n = 20, r = 0.022, p > 0.05. ALFF, amplitude of low-frequency fluctuation; PCUN, precuneus; ACC, anterior cingulate cortex.
