DKK1 and neuroblastoma: Alamar blue assays (Figure 5C) and flow cytometry analyses of Annexin V positively stained cells (Figure 5D) showed that linc00467 siRNA-1 reduced the number of viable cells and increased the proportion of cells positively stained by Annexin V, and that DKK1 siRNA blocked linc00467 siRNA-1-mediated reduction in the number of viable neuroblastoma cells and induction of Annexin V positively stained cells.