8620
A 9 - min OGD is needed in the DG to always induce the appearance of anoxic depolarization ( AD ) and the irreversible block of synaptic activity , as recorded up to 24 h from the end of the insult , whereas only 7 - min OGD is required in the CA1 region .
 None
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 None