8779
In this study, we have attempted to determine whether c-fos expression is induced by radiotherapy in human squamous cell carcinomas of the head and neck and to establish a possible correlation between c-fos expression and the therapeutic effects of radiation therapy .
 ( DNA: c-fos, None) , ( DNA: c-fos, 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:
 ( DNA: c-fos, None) , ( DNA: c-fos, None) 