MKI67 and neoplasm: The number of Ki67 positive tumor cells in rHE4-containing PBMC suspension was higher than the cells in rHE4-free suspension, and the increased activity was partially attenuated by adding BCI to the culture (27.6 ± 1.7%, 68.5 ± 2.6%, and 48.9 ± 2.3%, respectively; Figures 4B,C).