3019
After 2 days , plasma Na and Cl concentrations were reduced compared to controls at 100 mu M Pb and urea excretion rates were elevated .
 Chemical: Na; Chemical: Cl; Chemical: Pb; Chemical: urea
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: Cl; Chemical: Pb; Chemical: urea