Hassan, S. H., Beg, F. S. and Sheikh, S. A. (2015) “USEFULNESS OF MODIFIED BORG SCALE FOR DYSPNOEA IN CHRONIC OBSTRUCTIVE PULMONARY DISEASES AND ASTHMA IN A RURAL POPULATION OF KARACHI”, Pakistan Journal of Chest Medicine, 13(3). Available at: https://pjcm.net/index.php/pjcm/article/view/197 (Accessed: 8March2026).