| NI | Nasal Irrigation |
| MC | Mucociliary Clearance |
| URTI/URTIs | Upper Respiratory Tract Infection(s) |
| CT | Computed Tomography |
| ET | Eustachian tube |
| HS | Hypertonic solution |
| PM2.5/PM10 | Particulate Matter |
| AR | Allergic Rhinitis |
| ARS | Acute Rhinosinusitis |
| RCT | Randomized Controlled Trial |
| ARIA | Allergic Rhinitis and its Impact on Asthma |
| EPOS | European Position Paper on Rhinosinusitis and Nasal Polyps |
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