title: Evolution of RNA tumor viruses: analogy for nonviral carcinogenesis.
mesh_terms: D005075:Biological Evolution; D002471:Cell Transformation, Neoplastic; D005814:Genes, Viral; D006801:Humans; D009369:Neoplasms / Q000382:microbiology*; D009857:Oncogenes; D009858:Oncogenic Viruses / Q000235:genetics*; D012328:RNA Viruses / Q000235:genetics*