title: [Problem of the focal nature of leukemia (a review of the literature)].
mesh_terms: D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D003710:Demography; D006801:Humans; D007938:Leukemia / Q000453:epidemiology* / Q000209:etiology / Q000401:mortality; D008722:Methods; D013188:Sri Lanka; D013223:Statistics as Topic; D013548:Sweden; D014586:USSR; D014481:United States
vernacular_title: Problema ochagovosti leĭkozov (obzor literatury.