MKI67 and neoplasm: Additionally, while the basal number of apoptotic (caspase 3‐positive) and proliferating cells (Ki67‐positive) was increased in GFP‐positive tumor cells as compared to normal tissue, apoptosis further increased in GFP‐positive tumor cells upon combination treatment with dihydroartemisinin and 5‐ALA (Fig EV3G–I).