title: Screening for colorectal cancer.
mesh_terms: D001466:Barium Sulfate; D003110:Colonic Neoplasms / Q000175:diagnosis*; D003113:Colonoscopy; D004733:Enema; D006801:Humans; D009780:Occult Blood; D012004:Rectal Neoplasms / Q000175:diagnosis*
chemical_list: D001466:Barium Sulfate