11933
Stimulation of human neutrophils with chemoattractants FMLP or platelet activating factor ( PAF ) results in different but overlapping functional responses .
 platelet activating factor, human neutrophils, PAF, chemoattractants, FMLP
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:
 platelet activating factor, human neutrophils, PAF, chemoattractants, FMLP