HOXB13 and cancer: Increasing levels of HOXB13 were equally paralleled by decreasing PSA recurrence-free intervals if all cancers were jointly analyzed (p < 0.0001, Figure 5A), as in subsets of ERG-IHC-positive (p < 0.0001, Figure 5B) or ERG-IHC-negative cancers p < 0.0001, Figure 5C).