2351
In the final model , grade ( p = 0 . 0002 ) , peritoneal cytologic results ( p = 0 . 0002 ) , progesterone receptor status ( p = 0 . 004 ) , and age as a continuous variable ( p = 0 . 008 ) were most closely associated with disease - free survival .
 progesterone receptor
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 progesterone receptor