Thirty patients with CRS were randomized in three groups depending on the route of corticosteroids administration : @ days by oral route ( Medrol ( Pfizer , Belgique ) , @ mg/@ days -@ mg/@ days-@ mg/@ days ) ; nasal spray ( Rhinocort ( AstraZeneca , Belgique ) , @ @ @ g/nostril ) ; or sonic nebulization ( Pulmicort ( AstraZeneca , Belgique ) , @ @ mg/@ mL ) ( Sonic nebulizer , AOHBOX-NL@SN , DTF , France ) .