1703
Tissue factor ( TF ) is expressed rapidly by human monocytes exposed to bacterial endotoxin ( lipopolysaccharide , or LPS ).
 Tissue factor, human monocytes, bacterial endotoxin, TF
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:
 Tissue factor, human monocytes, bacterial endotoxin, TF