title: Cervical cytological studies in Lippes loop users.
mesh_terms: D000293:Adolescent; D000328:Adult; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007434:Intrauterine Devices / Q000009:adverse effects*; D008875:Middle Aged; D002578:Uterine Cervical Dysplasia / Q000453:epidemiology*; D002583:Uterine Cervical Neoplasms / Q000453:epidemiology*; D002575:Uterine Cervicitis / Q000453:epidemiology*