title: Leukaemia and twinning tendency in families of children with Down's syndrome.
mesh_terms: D002455:Cell Division; D002648:Child; D004200:Diseases in Twins; D004314:Down Syndrome / Q000150:complications*; D005260:Female; D006801:Humans; D007938:Leukemia / Q000150:complications / Q000235:genetics*; D008297:Male