Rifampicin and the assay of folate and vitamin B12.
D001774:Blood Chemical Analysis; D004912:Erythrocytes / Q000032:analysis; D005492:Folic Acid / Q000097:blood*; D006801:Humans; D012293:Rifampin / Q000097:blood / Q000494:pharmacology*; D014805:Vitamin B 12 / Q000097:blood*
D005492:Folic Acid; D014805:Vitamin B 12; D012293:Rifampin