5621
The effects of social isolation on morphine - induced locomotor activity were compared in : ( i ) animals with an intact hypothalamo - pituitary - adrenal ( HPA ) axis ; ( ii ) animals in which stress - induced corticosterone secretion was blocked by adrenalectomy .
 None
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
 Entities:  
Answer:
 None