Fractional Exhaled Nitric Oxide for Diagnosing Eosinophilic Chronic Rhinosinusitis: A Systematic Review and Meta-analysis
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Objective: The current gold standard for diagnosing eosinophilic chronic rhinosinusitis (ECRS) is tissue biopsy, but due to its invasive nature, there is a need for clinical diagnosis in outpatient settings or presurgical evaluat... ...