15848
When NP were injected by the intra - articular ( I . A . ) route to the mouse knee during on - going inflammatory arthritis of the K / BxN serum transfer model , joint inflammation was reduced together with NR4A2 expression , and local bone architecture was preserved .
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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:
 None