title: Sigmoidoscopy and the periodic health examination.
authors: G
authors: G
authors: Kandel
mesh_terms: D000328:Adult; D002170:Canada; D015179:Colorectal Neoplasms / Q000517:prevention & control*; D006801:Humans; D008403:Mass Screening / Q000191:economics; D008875:Middle Aged; D012812:Sigmoidoscopy / Q000191:economics