ABCC4 and hepatocellular carcinoma: Human tumor transcriptomic data for 377 HCC patients also show a positive correlation of multiple ABC transporters including the ABCB1, ABCC3, ABCC9 and ABCG2 with GHR expression, while ABCC1,ABCC4 and ABCG1 levels correlated with IGF1R expression (Figure 5H), confirming our in vivo observations.