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In previous studies , we demonstrated that miR - 193b expression is reduced in melanoma relative to benign nevi , and also that miR - 193b represses cyclin D1 and Mcl - 1 expression .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
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