title: Ascertainment bias of cervical carcinoma in situ.
authors.forename: R K
authors.initials: RK
authors.lastname: Sun
authors.forename: J M
authors.initials: JM
authors.lastname: Liff
mesh_terms: D002278:Carcinoma in Situ / Q000453:epidemiology*; D005260:Female; D005845:Georgia; D006801:Humans; D013223:Statistics as Topic; D002583:Uterine Cervical Neoplasms / Q000453:epidemiology*