Paired drug synergy plot for ara-C and RNRi (HU, n = 7; dF-dC, n = 5) in primary patient-derived AML blasts pre-treated with control (dX) or Vpx-containing (X) VLPs. Zero, >0, or <0 corresponds to additive, synergy, or antagonism, respectively, whilst >5 indicates strong synergy and <5 indicates strong antagonism. Each data point indicates an average delta score from a single patient sample subjected to a dose-response matrix experiment performed in triplicate. Statistical testing was performed using two-way ANOVA. 