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Meta-analysis results between laparoscopic and open surgery treatment of rectal cancer. There were no significant differences (A) in the number of lymph nodes and (B) circumferential-resection margin positive ratios for the two groups (P>0.05). (C) Laparoscopic surgery can not improve the overall survival and disease-free survival, compared to laparotomy (P>0.05). SD, standard deviation; 95% CI, 95% confidence interval; SE, standard error.
