1431
The hormone receptors of the primary tumor were known in 15 ( ER ) and 14 ( PR ) patients , respectively.
 protein: hormone receptors; protein: ER; protein: PR
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 protein: hormone receptors; protein: ER; protein: PR