MKI67 and neoplasm: The Ki67 immunohistochemical staining of tissue sections from excised xenograft tumours from the AmatuxEDVDox treated group showed a significant decrease in the number of proliferating cells, compared to the saline (p < 0.01), AmatuxEDV (p < 0.01) and Non-targetedEDVDox (p < 0.05) treated groups (Fig 6A and 6B).