In 1983 researchers found the approximate location of the gene for Huntington's disease, the incurable brain illness.

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His team has used the data to narrow the location of 21 genes for a like number of disorders, including arthritis, Parkinson's disease, obesity and stroke.

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Stefansson's team has used the data to narrow the location of 21 genes for a like number of disorders, including arthritis, Parkinson's disease, obesity and stroke.

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