15069
Additional factors - psychopathy , impulsiveness , and disruptions in the hypothalamic - pituitary - adrenal ( HPA ) axis - play a role in aggressive behavior but have rarely been examined in the same conceptual and experimental framework .
 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