Letter: Leukaemia and lymphoma linked by prior social contact.
D004739:England; D006801:Humans; D007938:Leukemia / Q000635:transmission*; D007945:Leukemia, Lymphoid / Q000635:transmission; D015470:Leukemia, Myeloid, Acute / Q000635:transmission; D008223:Lymphoma / Q000635:transmission*; D012924:Social Conditions