MKI67 and nasopharyngeal carcinoma: The percentage of Ki67+/DAPI+ cells at two weeks after transplantation was also much lower in NPC transplants (∼2.5%) than in organoid transplants (∼9%; p = 0.038), but the difference at four weeks became more variable, thus not statistically significant (∼4.5% in NPC grafts and 9% in organoid grafts, p = 0.21; Fig. 6B).