8788
In a sample from one of the patients , c-fos-positive lymphocytes were identified as CD4 positive and CD8 negative.
 ( protein: c-fos-positive lymphocytes, 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:
 ( protein: c-fos-positive lymphocytes, None) 