Graph showing Tumor weight versus days since subcutaneous implant of the SW-620 tumor in nu/nu NCr mice. There were five groups in the study. Group 1: 1x10^7 cells were implanted SC. 100% Take Rate. Group 2: 5x10^6 cells were implanted SC. 100% Take Rate. Group 3: 1x10^6 cells were implanted SC. 60% Take Rate. Group 4: 5x10^5 cells were implanted SC. 90% Take Rate. Group 5: 1x10^5 cells were implanted SC. 0% Take Rate. Notes: Ten animals were assigned to each group. Starting at Day 25, animals in various groups that had reached endpoint were removed from the study resulting in fluctuations in the growth curves at subsequent time points. Growth curves were no longer calculated when <70% remained in the group.