20356
At 10 . 0 mu M there was a 21 . 05 +/- 4 . 42 % ( p = 0 . 02 , n = 4 ) decrease in the force of contraction , while the frequency was not affected after 3h treatment ( p > 0 . 05 ) .
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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