Fig. 2From: Perioperative transfusion and the prognosis of colorectal cancer surgery: a systematic review and meta-analysisForest plot of overall survival after perioperative transfusion. SCC indicates sporadic colorectal cancer, HCC indicates hereditary colorectal cancer, group A in Miki C 2006 indicates the patient who received transfusion because of preoperative anaemia, and group B in Miki C 2006 indicates the patient who received transfusion because of excessive operative blood lossBack to article page