11796
The goal of this study was to use an episode of " transient hypoxia " as an extrinsic stressor to uncover latent susceptibility to environmental pollutants in a rodent model of hypertension .
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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