1947
Axillary nodal status , tumour progesterone receptor status , and season of tumour detection significantly influenced survival in both older ( greater than 50 yrs ) and younger ( less than 50 yrs ) patients .
 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