A further analysis of the differences between the two subgroups after the treatments of AdSurp-Hsp70+CIK or AdSurp-Hsp70 found that the level of Ki67 expression in the strongly positive Survivin tumor xenografts was not significantly different from the level of Ki67 expression in the weakly positive Survivin tumor xenografts (Fig. 5C). Here, BIRC5 is linked to neoplasm.