Colorectal cancer screening. Faecal occult blood tests.
D000368:Aged; D003110:Colonic Neoplasms / Q000175:diagnosis / Q000453:epidemiology*; D006801:Humans; D008403:Mass Screening / Q000592:standards*; D008875:Middle Aged; D009780:Occult Blood; D012004:Rectal Neoplasms / Q000175:diagnosis / Q000453:epidemiology*