BRCA1 and breast cancer: Funnel plots displaying RRs of the individual study versus the reciprocal of their standard errors did not show any substantial asymmetry in studies exploring the effect of 29/29 and 28/28 AIB1 poly-Q domain on risk of BC in BRCA1/2 (p = 0.117, Begg & Mazumdar adjusted rank correlation test, p = 0.405, Egger et al. regression asymmetry test; p = 0.766, Begg & Mazumdar adjusted rank correlation test, p = 0.602, Egger et al. regression asymmetry test, respectively).