When the two year period of susceptibility for series A children was split into 'pre-natal' and 'post-natal' years highly significant ex- cesses of space-time interaction links were evident for each.
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Space-time clustering of childhood acute lymphoblastic leukaemia: indirect evidence for a transmissible agent.
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The sentences
When the two year period of susceptibility for series A children was split into 'pre-natal' and 'post-natal' years highly significant ex- cesses of space-time interaction links were evident for each. Those occurring post-natally were slightly more marked. The analyses for younger series A cases (II - IV) show excess space-time linkages which are marginally significant Table II Analysis I.