1794
We investigated the effect of an early stress , in the form of maternal deprivation , combined with a later stress , simulated by chronic periadolescent corticosterone treatment , on behaviour in rats .
 Chemical: corticosterone
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 Chemical: corticosterone