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We show that this region of the genome contains a tandem duplication of approximately 30 kilobases , which results in two copies of BRCA1 exons 1 and 2 , of exons 1 and 3 of the adjacent 1A1 - 3B gene and of the previously reported 295 base pair intergenic region .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease 
Text: {0} 
Answer:
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