title: Letter: Acne and ovral.
mesh_terms: D000152:Acne Vulgaris / Q000139:chemically induced* / Q000188:drug therapy; D000293:Adolescent; D000328:Adult; D003276:Contraceptives, Oral / Q000009:adverse effects*; D005260:Female; D006801:Humans; D013752:Tetracycline / Q000627:therapeutic use
chemical_list: D003276:Contraceptives, Oral; D013752:Tetracycline