CKS1B and plasma cell myeloma: Cells were treated with 10 nM Nifuroxazide for 48 hours, Nifuroxazide treatment induced more inhibition of cell growth (Figure 4B) and more increase in cell death (Figure 4C) in CKS1B-transfected cells compared with EV-transfected cells, indicating that myeloma cells with higher CKS1B-expression levels are more sensitive to STAT3 inhibition than cells with lower CKS1B-expression.