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Several studies have demonstrated that the corticotropin - releasing factor test ( CRF ) is useful for the aetiological diagnosis of Cushing ' s syndrome : in Cushing ' s disease , as opposed to ectopic ACTH secretion syndrome , the hypothalamus - pituitary - adrenal ( HPA ) axis can still be stimulated by CRF .
 GENE: corticotropin - releasing factor; GENE: CRF; GENE: ACTH; GENE: CRF
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
Answer:
 GENE: corticotropin - releasing factor; GENE: CRF; GENE: ACTH; GENE: CRF