1989
These findings suggest that AGGR are suitable for the detection of organ - specific toxicity and that they could , in conjunction with the 3T3 / NRU cytotoxicity assay , improve the predictive capacity of in vitro toxicity testing .
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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:
 None