8093
Results obtained exposing cells for 72 h to AuNPs 5 and 15 nm citrate stabilized , revealed cytotoxic effects only for AuNPs 5 nm at concentration >= 50 mu M if measured by colony forming efficiency ( CFE ) .
 Chemical: citrate
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: citrate