353
The magnitude of transformation of the microglia assessed by the number of intersections was significantly higher in the PDN groups than in controls in the prefrontal cortex ( moderate - dose , 24 . 1 ; high - dose , 23 . 6 ; controls 18 . 7 ; p < 0 . 01 ) and striatum ( moderate - dose 25 . 6 ; high - dose 26 . 3 ; controls 18 . 9 ; p < 0 . 01 ) , but not in hippocampus .
 Chemical: PDN
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 Chemical: PDN