27822
We examined neuroimmune system effects in C57BL / 6J mice with Pb exposure , including levels that may be common among children in lower socioeconomic income environments .
 Chemical: Pb
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: Pb