2116
Antioxidants have been proposed to be anti-atherosclerotic agents ; however, the mechanisms underlying their beneficial effects are poorly understood.
 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