Occult blood screening of Canadians: wise or unwise?
D002170:Canada; D003110:Colonic Neoplasms / Q000191:economics / Q000517:prevention & control*; D003365:Costs and Cost Analysis; D006801:Humans; D008403:Mass Screening / Q000191:economics; D009780:Occult Blood; D012004:Rectal Neoplasms / Q000191:economics / Q000517:prevention & control*