17779
In this preliminary study , the silver nanoparticle ( Ag NP ) - based dressing , Acticoat (TM) Flex 3 , has been applied to a 3D fibroblast cell culture in vitro and to a real partial thickness burn patient .
 Chemical: silver; Chemical: Ag
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: silver; Chemical: Ag