APOBEC3B and breast cancer: As shown in Table 1, the frequency of the APOBEC3B deletion in breast cancer cases does not significantly differ from that observed in population controls in GDANSK[OR(95%CI)=1.31(0.94-1.82), p=0.11)] or SZCZECIN [OR(95%CI)=0.89(0.74-1.07), p=0.20].