2581
Avascular necrosis of the femoral head in patients with prostate cancer treated with cyproterone acetate and radiotherapy .
 Avascular necrosis of the femoral head, cyproterone acetate
Please list all entity pairs containing a certain relationship in the given options.Output format is "word1, word2; word3, word4". 
Option: adverse effect 
Text: {0} 
Answer:
 Avascular necrosis of the femoral head, cyproterone acetate