1551
The numbers of estrogen receptor ( ER ) in human peripheral leucocytes in 22 women with climacteric syndrome were measured by radioligand method .
 protein: estrogen receptor; cell type: human peripheral leucocytes; protein: ER
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: estrogen receptor; cell type: human peripheral leucocytes; protein: ER