1042
PROBLEM: The clinical significance of the differential expression of estrogen receptor ( ER ) in human monocytes was evaluated.
 protein: ER; cell type: human monocytes; protein: estrogen receptor
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: ER; cell type: human monocytes; protein: estrogen receptor