SLCO1B3 and benign prostatic hyperplasia: Regarding the two SLCO genes, for both rs12422149 (SLCO2B1) and rs4149117 (SLCO1B3), the most frequent genotype was the GG (74%—PC group; 61%—BPH group) and the TT genotype, respectively (74%—PC group; 72%—BPH group).