Pradana, A., Tarigan, A.P. , Pandia, P. , Pangestu, D. and Andini, N. 2026. The Relationship Between Diaphragmatic Thickness and Pulmonary Function In Patients with Chronic Obstructive Pulmonary Disease: A Cross-Sectional Study. Respiratory Science. 6, 3 (Jun. 2026), 161-170. DOI:https://doi.org/10.36497/respirsci.v6i3.231.