3568
Alternate immune system targets for TCDD : lymphocyte stem cells and extrathymic T-cell development .
 ( cell type: extrathymic T-cell, None) , ( cell type: lymphocyte stem cells, 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: extrathymic T-cell, None) , ( cell type: lymphocyte stem cells, None) 