18582
CRPC is characterized by reactivation of the androgen axis due to changes in androgen receptor signaling and / or adaptive intratumoral androgen biosynthesis .
 androgen, androgen, androgen
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 androgen, androgen, androgen