As a positive control, in the absence of bladder tumor isolated CD45+ cells, the percentage of splenic CD4+ and CD8+ T cells from naïve mice that expressed Ki67 following αCD3/28 in vitro stimulation was 66.6 and 81.6%, respectively (Fig. 4a, right panels: labeled T cells only). Here, MKI67 is linked to urinary bladder neoplasm.