5855
Clusters of genes expressed by stromal cells and lymphocytes in the breast tumors also were identified in this analysis.
 stromal cells, lymphocytes, genes
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:
 stromal cells, lymphocytes, genes