7190
We examined the role of corticosteroids in the in vitro expansion of primary human erythroid cells in liquid cultures and colony assays.
 ( cell type: primary human erythroid 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: primary human erythroid cells, None) 