Fig. 3From: Prognostic and clinicopathological significance of circulating tumor cells detected by RT-PCR in non-metastatic colorectal cancer: a meta-analysis and systematic reviewSubgroup analyses. a&b Pre-operation and intra/post-operation on overall survival and disease-free survival, respectively; c&d Without and with post-chemotherapy on overall survival and disease-free survival, respectively; e&f Stage II and stage III on overall survival and disease-free survival, respectivelyBack to article page