1719
Based on these data , it can be speculated that pubertal AAS users with low central 5 - HT may be especially prone to exhibit aggressive behavior .
 Chemical: 5 - HT; Disease: aggressive behavior
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: 5 - HT; Disease: aggressive behavior