title: Screening for colorectal cancer: recommendation and rationale.
mesh_terms: D001466:Barium Sulfate; D003113:Colonoscopy; D015179:Colorectal Neoplasms / Q000517:prevention & control*; D004733:Enema; D006801:Humans; D008403:Mass Screening / Q000379:methods*; D009780:Occult Blood; D012812:Sigmoidoscopy; D014481:United States
chemical_list: D001466:Barium Sulfate