4548
Allergic airway inflammation is characterized by increased expression of pro - inflammatory mediators , inflammatory cell infiltration , mucus hypersecretion , and airway hyperresponsiveness , in parallel with oxidative DNA base and strand damage , whose etiological role is not understood .
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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