ALDH1B1 and Familial prostate cancer: A fourth SNP, rs10973794 in ALDH1B1 (also close to IGFBPL1), was associated with prostate cancer mortality in men with a diagnosis of low‐grade prostate cancer (HRfixed = 1.43; 95%CI:1.14,1.79, p values = 0.002, I2 = 23.4, Fig. 4).