tokens: Allergen - stimulated levels of PGD2 were 1274 + / - 565 versus 1468 + / - 679 after prednisone ; likewise , allergen - stimulated 5 - HETE levels were 95 + / - 21 versus 82 + / - 21 ; those of LTE4 were 54 + / - 20 versus 91 + / - 51 ; and those of 15 - HETE were 63 + / - 19 versus 60 + / - 25 .