Since mice were injected with equal numbers of each tumor type, any differences in tumor load measured as the percentage of GFP+ or mChy+ cells in total lung cell suspensions could be due to a reduced engraftment capacity, in which case the B16-GFP group should have a greater number of individual tumors than lungs from the B16-ASIP-mChy group. Here, ASIP is linked to neoplasm.