7291
Although statistical evaluation of the data showed a significant difference between patients with a chronic MPD and control subjects , proof of clonality in individual, especially elderly, patients is difficult.
 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