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Shown are Kaplan - Meier probability plots of overall survival in high - risk breast cancer patients as a function of randomization to postmastectomy radiotherapy ( RT ) within the subgroups of carbonic anhydrase ( CA ) IX negative and CA IX positive patients .
 Anatomy: breast cancer
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Anatomy 
Text: {0} 
Answer:
 Anatomy: breast cancer