Correlation Of Six-Minute Walk Test, Dyspnea Severity, And Spirometric Indices In Patients With Copd Exacerbations In A Tertiary Care Centre. VER [Internet]. 2024 Dec. 19 [cited 2026 Jan. 15];7(2):212-23. Available from: https://verjournal.com/index.php/ver/article/view/848