Study population
Twenty participants were included (age 47.72±11.65 years, 50% female), of whom 100% had comorbid asthma and 55% were atopic (Table 1). Time since last endoscopic sinus surgery was 4.1±3.5 years. Intranasal corticosteroids were used by 50% and oral steroids by 10% patients prior to study enrolment.