FAILURE TO ISOLATE VIRAL AGENTS FROM BONE-MARROWS OF CHILDREN WITH ACUTE LEUKAEMIA.
D000293:Adolescent; D001853:Bone Marrow; D001854:Bone Marrow Cells; D002648:Child; D004622:Embryo, Mammalian; D004625:Embryo, Nonmammalian; D007223:Infant; D007231:Infant, Newborn; D007668:Kidney; D007938:Leukemia; D009369:Neoplasms / Q000209:etiology*; D009858:Oncogenic Viruses; D046509:Tissue Culture Techniques; D014776:Virus Cultivation
ADOLESCENCE; BONE MARROW CELLS; CHILD; EMBRYO; INFANT; INFANT, NEWBORN; KIDNEY; LEUKEMIA; NEOPLASM ETIOLOGY; ONCOGENIC VIRUSES; TISSUE CULTURE; VIRUS CULTIVATION