Figure 3From: Application of the multicellular tumour spheroid model to screen PET tracers for analysis of early response of chemotherapy in breast cancerKi67 staining of spheroid sections illustrating proliferating cells (black colour) after 3-day exposure to 1 μM non-drug medium (a), paclitaxel (b), docetaxel (c), doxorubicin (d), tamoxifen (e) and imatinib (f).Back to article page