Mongolism in both of twins of opposite sex.
D004194:Disease; D004200:Diseases in Twins; D004314:Down Syndrome / Q000235:genetics*; D040941:Heredity; D006801:Humans; D014427:Twins
MONGOLISM/heredity; TWINS/diseases
Lancet. 1954 Sep 11;267(6837):505-9
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