title: Letter: Norgestrel and acne.
mesh_terms: D000152:Acne Vulgaris / Q000139:chemically induced*; D002986:Clinical Trials as Topic; D004359:Drug Therapy, Combination; D004997:Ethinyl Estradiol / Q000627:therapeutic use; D005260:Female; D006801:Humans; D009644:Norgestrel / Q000009:adverse effects* / Q000627:therapeutic use
chemical_list: D009644:Norgestrel; D004997:Ethinyl Estradiol