1474
In August, 1992, we established a leukemic cell line ( NS-Meg ) from a patient in megakaryoblastic transformation of Philadelphia chromosome-positive chronic myeloid leukemia .
 ( cell line: leukemic cell line, None) , ( cell line: NS-Meg, 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 line: leukemic cell line, None) , ( cell line: NS-Meg, None) 