3035
The goal of this study was to develop a robust cell - based assay system to directly measure the role of P - gp - driven efflux in reducing the potency of hepatitis C virus ( HCV ) replication inhibitors .
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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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