“…Amiotti (1953) found no increase in the incidence of malignant disease in the families of leukaemic children. Steinberg (1960) found no increase over the expected deaths from cancer in the families of 249 children with acute leukaemia and, after reviewing the literature, he concluded that there was, in general, no increased risk, but that, rarely, there might be a recessive inheritance. Morganti and Cresseri (1954) gave a detailed statistical analysis of the reports of familial leukaemia, and concluded that the published reports were so markedly selected that they gave an exaggerated impression of the familial character of leukaemia which was, in their opinion, a negligible factor in its aetiology.…”