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In summary , we find a high and very consistent heritability estimate for TL , evidence for a maternal inheritance component and a positive association with paternal age . European Journal of Human Genetics advance online publication , 16 January 2013 ; doi : 10 . 1038 / ejhg . 2012 . 303 .
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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:
 None