11569
Human immunodeficiency virus type 1 ( HIV-1 ) replicates more efficiently in vitro in differentiated macrophages than in freshly isolated monocytes .
 freshly isolated monocytes, monocytes, differentiated macrophages
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 freshly isolated monocytes, monocytes, differentiated macrophages