5187
In this report, we describe the presence of constitutively activated STAT factors in peripheral blood cells from patients with acute leukemia .
 ( cell type: peripheral blood cells, None) , ( protein: STAT factors, 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:
 ( cell type: peripheral blood cells, None) , ( protein: STAT factors, None) 