Nasal provocation test
NPT-LASA was performed in all patients reporting respiratory symptoms,
regardless of the other organs involved [10, 23]. Results were
considered positive if an increase ≥30% in the total nasal symptoms and
a decrease ≥30% in the total volume of both nasal cavities from 2 to 6
cm (vol 2–6 cm), measured by acoustic rhinometry, was observed.