passages.id: split_1_test_2767_passage
passages.type: progene_text
passages.text: PMNs were stimulated with phorbol myristate acetate ( PMA , 1 and 10 ng / ml ) , diesel exhaust particles ( DEPs ) , carbon black ( CB ) and ultrafine CB ( ufCB , 125 , 250 and 500 microg / ml ) .