12188
No effect was observed on the body concentrations of Na and Ca at 50 to 500 micro g / L AgNPs with 1 - micro M cysteine addition .
 Chemical: Na; Chemical: Ca; Chemical: cysteine
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: Na; Chemical: Ca; Chemical: cysteine