Ascertainment bias in case-control studies of cancer screening.
J V
JV
Selby
G D
GD
Friedman
C P
CP
Quesenberry
N S
NS
Weiss
D016022:Case-Control Studies; D003110:Colonic Neoplasms / Q000175:diagnosis* / Q000401:mortality*; D006801:Humans; D008403:Mass Screening / Q000592:standards*; D016017:Odds Ratio; D012004:Rectal Neoplasms / Q000175:diagnosis* / Q000401:mortality*; D015983:Selection Bias; D012812:Sigmoidoscopy / Q000592:standards*