title: Tumor heterogeneity in metastasis.
mesh_terms: D000818:Animals; D008262:Macrophage Activation; D008325:Mammary Neoplasms, Experimental / Q000473:pathology; D008727:Methotrexate / Q000627:therapeutic use; D051379:Mice; D009362:Neoplasm Metastasis; D009374:Neoplasms, Experimental / Q000188:drug therapy / Q000235:genetics / Q000473:pathology*; D013866:Thioguanine / Q000494:pharmacology
chemical_list: D013866:Thioguanine; D008727:Methotrexate