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The level of circulating DCs increased at 6–8 weeks after primary tumour resection in colorectal patients without residual disease (Wilcoxon's signed rank test, n = 31, P = 0·0002) compared with those with residual disease (n = 10, P = 0·41) and with ‘no-cancer’ controls (n = 41, P = 0·94). Pre = preoperatively; Post = 6–8 weeks postoperatively; bars represent median and interquartile range. *Wilcoxon's signed rank test.
