5210
This study was carried out to determine the respiratory effect of diesel exhaust particles ( DEP ; 0 . 4mg / kg ) on mice rendered diabetic by the injection of streptozotocin or vehicle ( control ) .
 streptozotocin
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 streptozotocin