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In an exploration of the potential role of the glucocorticoid receptor (GR) in AD , GR density and affinity were assessed on mononuclear leukocytes of 12 AD patients and 12 healthy controls .
 cell type: mononuclear leukocytes
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:
 cell type: mononuclear leukocytes