3441
Therefore , this study used a simple hepatocytes model combined with an in vivo injection model to simulate the passage of a small amount of NPs into the bloodstream following exposure , e . g . , via ingestion or inhalation , and examined the potential of Ag NPs of 20 nm diameter to cause toxicity , inflammation , and oxidative stress in the liver following in vivo exposures of female Wistar rats via iv injection to 50 mu g of NPs and in vitro exposures using the human hepatocyte cell line C3A .
 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: Ag