Gut feelings that don't add up.
D000328:Adult; D000368:Aged; D003110:Colonic Neoplasms / Q000175:diagnosis*; D005260:Female; D006266:Health Education; D006801:Humans; D008297:Male; D008875:Middle Aged; D009780:Occult Blood; D012004:Rectal Neoplasms / Q000175:diagnosis*