3688
Two hr post - injection , DXNP was 2 . 7 times more concentrated in kidneys than free DX ( p < 0 . 025 ) .
 Chemical: DX
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: DX