title: National Conference on Cancer of the Colon and Rectum. Etiology and host factors. Introductory remarks.
mesh_terms: D002273:Carcinogens; D003110:Colonic Neoplasms / Q000209:etiology*; D006801:Humans; D012004:Rectal Neoplasms / Q000209:etiology*
chemical_list: D002273:Carcinogens