10814
Conversely , GABA - CB1 - KO mice showed a drastic reduction of these parameters , confirming that CB1 is present at much higher density on hippocampal GABAergic interneurons than glutamatergic neurons .
 Chemical: GABA
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: GABA