passages.id: split_5_test_1672_passage
passages.type: progene_text
passages.text: Tobacco smokers with at least one CYP1A1 ( MspI ) m2 allele , one CYP1B1 Val allele , one COMT Met allele , or two CYP1A2 A alleles were at significantly increased risk of ovarian cancer compared to never - smokers with CYP1A1 ( MspI ) ml / ml , CYP1B1 Leu / Leu , COMT Val / Val , or CYP1A2 A / A genotypes , respectively .