Summary . Immunoglobulins (IgG, IgM and IgA) were estimated in sera from mothers and siblings of children with acute lymphoblastic leukaemia (ALL) and in sera from appropriate controls. The distribution of IgA titres was significantly lower in the siblings of leukaemic children than in control children and that of IgM was significantly higher in mothers of leukaemic children than in control mothers.
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Sutton et al. (1969) studied this question.
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