title: The origin and evolution of tumor viruses: implications for leukocyte differentiation and leukemia in man.
mesh_terms: D002471:Cell Transformation, Neoplastic; D004273:DNA, Neoplasm / Q000032:analysis; D006801:Humans; D007938:Leukemia / Q000382:microbiology*; D007962:Leukocytes; D008213:Lymphocyte Activation; D009363:Neoplasm Proteins / Q000032:analysis; D009858:Oncogenic Viruses / Q000032:analysis / Q000145:classification*; D012334:RNA, Neoplasm; D012194:RNA-Directed DNA Polymerase; D014764:Viral Proteins / Q000032:analysis
chemical_list: D004273:DNA, Neoplasm; D009363:Neoplasm Proteins; D012334:RNA, Neoplasm; D014764:Viral Proteins; D012194:RNA-Directed DNA Polymerase