Polymorphisms in the human aromatase cytochrome P450 gene (CYP19) and breast cancer risk.
Healey CS, Dunning AM, Durocher F, Teare D, Pharoah PD, Luben RN, Easton DF, and Ponder BA
Carcinogenesis. Feb 2000
(DOI : 10.1093/carcin/21.2.189)