26212
The basal levels of 5 - HT in the DRN , but not in the PFC , in WKY rats was reduced as low as 30 % of Wistar rats .
 Chemical: 5 - HT
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: 5 - HT