550
Proliferation increased rapidly immediately after the lesion in the parenchyma of the injured telencephalon , while proliferation at the ventricular surface appeared after 48 h and peaked at 7 days .
 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