MKI67 and neoplasm: Along with tumor volume changes, dox withdrawal results in a significant decrease in Ki67 expression 2, 4, and 8 days after dox withdrawal (p < 0.05; Tukey test) and a significant increase in CC3 expression 4 days after dox withdrawal (p < 0.05; Tukey test) (Fig. 1b; n = 4 tumors, quantified in Supplementary Fig. 1a).