3561
Zymosan - induced ROS production is higher than the formyl - methionyl - leucyl - phenylalanine ( fMLF ) - or the phorbol myristate acetate ( PMA ) - induced ROS production but is lower than the one induced by opsonized zymosan .
 formyl - methionyl - leucyl - phenylalanine, fMLF, phorbol myristate acetate, PMA
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 formyl - methionyl - leucyl - phenylalanine, fMLF, phorbol myristate acetate, PMA