18234
DA release was significantly increased by 2 micro M MeHg at 60min and by 5 micro M MeHg at 30min ; 1 micro M MeHg was without effect .
 MeHg, MeHg, MeHg
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 MeHg, MeHg, MeHg