25090
A P - glycoprotein ( P - gp ) IC50 working group was established with twenty - three participating pharmaceutical and contract research laboratories and one academic institution to assess inter - laboratory variability in P - gp IC50 determinations .
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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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