title: Letter: Leukaemia-specific D.N.A. and twins.
mesh_terms: D002648:Child; D004273:DNA, Neoplasm / Q000097:blood*; D004200:Diseases in Twins; D006801:Humans; D007938:Leukemia / Q000209:etiology / Q000235:genetics*; D007962:Leukocytes / Q000032:analysis*; D009858:Oncogenic Viruses / Q000472:pathogenicity
chemical_list: D004273:DNA, Neoplasm