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Dynamic changes of three CTCs types in the metastatic group. (Data were presented as mean ± SD and P < 0.05 was considered statistically significant. Pre-op: preoperatively, post-op 6m: 6 months postoperatively, post-op 12m: 12 months postoperatively. * P < 0.05 Post-op 12m vs. Pre-op; ** P < 0.05 Post-op 12m vs. Post-op 6m.).
