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We suggest a reason for this incongruity is that mast cell - dependent responses , which may play an important role in the pathogenesis of both atopic and non - atopic asthma , are not a key component in most of the current asthma mouse models .
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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