Editorial: Colorectal cancer: A continuing challenge.
D000570:American Cancer Society; D003110:Colonic Neoplasms / Q000175:diagnosis* / Q000473:pathology; D004724:Endoscopy / Q000379:methods; D006266:Health Education; D006801:Humans; D009780:Occult Blood; D011351:Proctoscopy; D012004:Rectal Neoplasms / Q000175:diagnosis* / Q000473:pathology; D012812:Sigmoidoscopy