SLCO1B1 and breast cancer: One BC-causal locus (rs4149056 SLCO1B1) and one locus linked to another BC-causal locus (rs1260326 GCCR in LD [r2 = 0.91; D’ = 0.96] with BC-associated rs780093 GCCR) lead to amino acid substitutions (Val174Ala SLCO1B1 and Leu446Pro GCCR, respectively) having the predictive class “deleterious (SIFTscore-0.002)/probably damaging(Polyphen2score-1.000)” and “tolerated (SIFTscore-0.747)/possibly damaging (Polyphen2score-0.806)”, respectively.