Methods
Clinical evaluation, based on patient reported outcomes (Asthma Control
Questionnaire 5 (ACQ5) and Asthma Control Test (ACT), was performed.
Pulmonary function tests and FeNO have been used to assess airway
function and inflammation, respectively. Sino-nasal Outcome Test 22
(SNOT-22) has been used to score upper airway involvement. Sensitization
to Staphylococcus aureus enterotoxins was detected by ImmunoCAP
(ThermoFisher Scientific/Phadia, Uppsala, Sweden).