IL6 and cancer: In the other cluster, 71.1% of pairs of cancer biomarkers (32/45) exhibited positive correlation (P < 0.05) with the highest correlations between HGF and VEGF (ρ = 0.84 P < 0.0001), HGF and sFas (ρ = 0.79, P < 0.0001) and IL-6 and VEGF (ρ = 0.76, P < 0.0001).