BMP4 and neoplasm: The benefit of statin use was most evident in patients whose tumours expressed low levels of BMP4 (Figure 5f,i), with a non-significant trend towards benefit in patients with high-BMP4 tumours (Figure 5g,j) (HRs for distant relapse-free survival, 0.25 and p = 0.019; 0.40 and p = 0.13, respectively).