5011
These results identify a new signal transduction pathway activated by GM-CSF and provide a mechanism for rapid activation of gene expression in GM-CSF -stimulated PMN .
 GM-CSF, GM-CSF -stimulated PMN, PMN, GM-CSF
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:
 GM-CSF, GM-CSF -stimulated PMN, PMN, GM-CSF