title: Formal discussion of: a survey of the tumor virus problem from an epidemiologic standpoint.
mesh_terms: D001354:Avian Leukosis Virus; D004812:Epidemiologic Methods; D006801:Humans; D007938:Leukemia / Q000453:epidemiology* / Q000209:etiology; D009052:Leukemia Virus, Murine; D012190:Retroviridae