11147
Taken together , they uphold the emerging concern that women with ER ( + ) cancers may not benefit significantly from endocrine treatment if the tumors also overexpress HER - 2 .
 ER ( + ), HER - 2
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 ER ( + ), HER - 2