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John Langdon
British physician John Langdon Down described the first characterized Down syndrome as a distinct form of mental disability -
The report
John Langdon published report in 1866 about Down Syndrome -
jean Etienne
. The condition was clinically described earlier in the 19th century by Jean Etienne Dominique Esquirol in 1938 -
Edouard Seguin
. The condition was clinically described by Edouard Seguin in 1944.