Folate, carotene, and smoking.
D000328:Adult; D002338:Carotenoids / Q000097:blood*; D004912:Erythrocytes / Q000032:analysis*; D005260:Female; D005492:Folic Acid / Q000097:blood*; D006801:Humans; D012907:Smoking
D002338:Carotenoids; D005492:Folic Acid