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001). However, when compared between groups, no significant differences for all parameters were reported. PNEFR showed good results after the first week of 3% NaCl irrigation (p value = 0.001), while 0.9% NaCl had good results after the second week (p value 0.001). Both add-on treatments have a significant improvement of all 4 parameters assessed in the study nasal congestion, rhinorrhea, inferior turbinate size and PNEFR. Of note, 3% NaCl but not 0.9 NaCl had improved the PNEFR earlier from 1 week of the treatment. Both add-on treatments have a signif