title: The origin of metastatic heterogeneity in tumors.
mesh_terms: D000818:Animals; D002460:Cell Line; D002472:Cell Transformation, Viral; D005347:Fibroblasts; D008175:Lung Neoplasms / Q000473:pathology / Q000556:secondary*; D051379:Mice; D008807:Mice, Inbred BALB C; D009362:Neoplasm Metastasis / Q000473:pathology*; D009053:Sarcoma Viruses, Murine; D012513:Sarcoma, Experimental / Q000473:pathology*