The role of proctosigmoidoscopy in screening for colorectal neoplasia.
D000328:Adult; D003110:Colonic Neoplasms / Q000175:diagnosis / Q000517:prevention & control*; D003362:Cost-Benefit Analysis; D005069:Evaluation Studies as Topic; D005336:Fiber Optic Technology / Q000295:instrumentation; D014943:Global Health; D006801:Humans; D008137:Longitudinal Studies; D008403:Mass Screening / Q000191:economics / Q000592:standards; D008875:Middle Aged; D012004:Rectal Neoplasms / Q000175:diagnosis / Q000517:prevention & control*; D012306:Risk; D020694:Sigmoidoscopes; D012812:Sigmoidoscopy / Q000191:economics / Q000193:education