title: Letter: reduced incidence of spontaneous tumors: Another statistical analysis.
mesh_terms: D000818:Animals; D008325:Mammary Neoplasms, Experimental / Q000517:prevention & control*; D051379:Mice; D008809:Mice, Inbred C3H; D011063:Poly A-U / Q000627:therapeutic use*; D013223:Statistics as Topic
chemical_list: D011063:Poly A-U