Peripheral Airway Dysfunction Assessed by Impulse Oscillometry in School-Aged Children Born Preterm: A Cross-Sectional Comparative Study - Nezihe Koker Ozer; Ercan Yılmaz; Hatice Turgut; Erdem Topal; Ramazan Ozdemir; Recep Gunakın; Mehmet Aslan (Journal of Clinical Medicine, 2026)