Per-allele odds ratios for breast cancer risk by estrogen receptor status.

*ORs adjusted for study. **P for heterogeneity calculated from case-only analyses adjusted for study. ***Permutation adjusted P for heterogeneity* 校正研究因素后的比值比（Odds Ratio, OR）。 ** 基于经研究因素校正的仅病例分析计算所得的异质性P值。 *** 经置换检验校正的异质性P值。