14700
In the present study , in vitro systems were utilized where alveolar macrophages ( AM ) and bone marrow - derived macrophages ( BMdM ) were exposed to concentrated wood smoke - derived particulate matter ( WS - PM ) and mice were exposed in vivo to either concentrated WS - PM or inhaled WS .
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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:
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