21947
Permeability studies showed a correlation ( r ( 2 ) = 0 . 92 ) between in vitro TR146 cell culture and ex vivo porcine buccal mucosa in a modified Ussing chamber .
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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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