title: Development of tumors, particularly mammary tumors, in agent-free substrain R3eB-De mice.
mesh_terms: D000230:Adenocarcinoma / Q000235:genetics; D000367:Age Factors; D000818:Animals; D001947:Breeding; D002296:Carcinosarcoma / Q000235:genetics; D005260:Female; D005354:Fibrosarcoma / Q000235:genetics; D008325:Mammary Neoplasms, Experimental / Q000235:genetics*; D008324:Mammary Tumor Virus, Mouse; D051379:Mice; D009369:Neoplasms / Q000235:genetics*; D010063:Ovum; D011247:Pregnancy