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This lack of knowledge about the underlying genetic causes of diabetes is often referred to as missing heritability ( Manolio et al . , 2009 ) which exceeds 80 % for T2D but less than 25 % for T1D .
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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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