Abbas SA, Saboor S, Abbas SN. Prevalence of comorbidities in patients admitted with acute exacerbation of COPD in a tertiary care hospital. Pak J Chest Med [Internet]. 2018Sep.16 [cited 2025Dec.26];24(3):152-7. Available from: https://www.pjcm.net/index.php/pjcm/article/view/545