“Relationship of Fractional Exhaled Nitric Oxide With Blood Eosinophilia in Characterizing Type-2 Airway Inflammation in Treatment-naïve Patients With Chronic Obstructive Pulmonary Disease”. Monaldi Archives for Chest Disease (July 21, 2025). Accessed July 22, 2025. https://www.monaldi-archives.org/macd/article/view/3315.