title: Establishment of a milk agent-free substrain C3HeB-Os and effect of foster nursing on occurrence of mammary tumors.
mesh_terms: D000818:Animals; D005260:Female; D007178:Inbreeding; D008297:Male; D008325:Mammary Neoplasms, Experimental / Q000453:epidemiology* / Q000473:pathology; D008324:Mammary Tumor Virus, Mouse; D051379:Mice; D008892:Milk