8783
Three of the 27 patients with squamous cell carcinoma showed slight expression of c-fos in their tumor cells before and/or at 4 or 10 Gy of radiotherapy .
 None
Locate the role in the text that participated in the event based on the event type and return it in the event list. 
 Option: Event type: RNA,cell type,protein,cell line,DNA, Arguments type: . 
Text: {0} 
Answer:
 None