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To understand the physiological role of APJ in regulation of the hypothalamic - pituitary - adrenal ( HPA ) axis , we measured ACTH and corticosterone ( CORT ) plasma levels in male and female mice lacking APJ ( APJ knockout , APJ KO ) and in wild - type controls , in response to a variety of acute stressors .
 Chemical: corticosterone; Chemical: CORT
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: corticosterone; Chemical: CORT