Note that significant cross talk exists between the factors and mediators listed in this figure. BMPR2, gene encoding bone morphogenic protein receptor 2; CYP1B1, gene encoding cytochrome P450 1B1; CYP19A1, gene encoding aromatase; DHEA, dehydroepiandrosterone; ESR1, gene encoding estrogen receptor α; SNP, single-nucleotide polymorphism.