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The mutation underlying Huntington disease ( HD ) is CAG expansion in the first exon of the HD gene .
 Disease: Huntington disease; Disease: HD; Disease: HD
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease 
Text: {0} 
Answer:
 Disease: Huntington disease; Disease: HD; Disease: HD