title: Transformation by reticuloendotheliosis virus: development of a focus assay and isolation of a nontransforming virus.
mesh_terms: D000818:Animals; D002471:Cell Transformation, Neoplastic; D002472:Cell Transformation, Viral; D002478:Cells, Cultured; D002645:Chickens; D003588:Cytopathogenic Effect, Viral; D007700:Kinetics; D001356:Reticuloendotheliosis virus / Q000254:growth & development / Q000502:physiology*; D012190:Retroviridae / Q000502:physiology*; D014412:Tumor Virus Infections / Q000209:etiology; D014762:Viral Interference