Commentary: Case-control studies of screening should carry a health warning.
Raffle
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Consultant in Public Health Medicine. Bristol North Primary Care Trust, King Square House, King Square Bristol, BS2 8EE, UK. angela.raffle@bristolnorth-pct.nhs.uk
D016022:Case-Control Studies; D003627:Data Interpretation, Statistical; D005260:Female; D006801:Humans; D008403:Mass Screening / Q000706:statistics & numerical data*; D014626:Vaginal Smears