3885
In conclusion , viable excised human intestine mounted in the Ussing chamber , is a powerful technique for predicting regional fraction absorbed ( f ( a ) ) , transporter - mediated uptake or efflux as well as intestinal metabolism of drug candidates in man .
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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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