Oxford sliding scale recall scheme.
D000328:Adult; D000368:Aged; D003951:Diagnostic Errors; D004739:England; D005188:False Negative Reactions; D005260:Female; D006801:Humans; D008875:Middle Aged; D013997:Time Factors; D002583:Uterine Cervical Neoplasms / Q000517:prevention & control*; D014626:Vaginal Smears