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We assessed serum IgE levels , B - cell counts , cytokine production , IgE production in hilar lymph nodes , eosinophil counts , chemokine levels in bronchoalveolar lavage fluid , and cytokine gene expression in the lung .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
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