22498
The purpose of this study was twofold : ( i ) to determine the effect of EGCG on fibroblast differentiation into myofibroblasts and extracellular matrix accumulation in transforming growth factor ( TGF ) - beta 1 - induced nasal polyp - derived fibroblasts ( NPDFs ) and ( ii ) to determine if the antioxidative effect of EGCG on reactive oxygen species ( ROS ) production in TGF - beta 1 - induced NPDFs is involved in the aforementioned processes .
 Chemical: EGCG; Chemical: EGCG; Chemical: oxygen
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: EGCG; Chemical: EGCG; Chemical: oxygen