ERBB2 and breast cancer: In the ER+ (OR = 0.78; 95% CI, 0.65–0.94) and ER− breast cancer subtypes (OR = 0.71; 95% CI, 0.56–0.90), folate intake was negatively correlated with the incidence of breast cancer, but not in the PR+, PR−, ER+/PR+, ER−/PR−, HER2+, and HER2− subtypes.