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%Change in peak nasal inspiratory flow (PNIF; A), minimal cross-sectional area (MCA; B), and total nasal volume (TNV; C) before and after a nasal challenge with Dermatophagoides pteronyssinus (DP) allergen extract. DP_15 min, 15 minutes after the DP challenge; DP_30 min, 30 minutes after the DP challenge; AR, allergic rhinitis; NAR, non-allergic rhinitis. Unpaired t-test with Welch’s correction, statistical significance: P<0.05.
