14354
Further , these results suggest that the association between rs16969968 and lung cancer may be mediated by the quantity of smoke inhaled . The Pharmacogenomics Journal advance online publication , 29 January 2013 ; doi : 10 . 1038 / tpj . 2012 . 50 .
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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