23657
Results showed that relative methylation of IFN - gamma promoter was significantly increased in DA + in comparison with both comparator groups ( DA - and AW ) , and it exhibited good sensitivity ( 77 . 5 % ) and specificity ( 80 % ) for identifying DA workers in a multivariate predictive model after adjusting for type of DI exposure , smoking status , methacholine PC20 , and gender .
 Chemical: methacholine
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: methacholine