Kabir MA, Haque SD, Baker DA, Alam MK, Rahman SA. Study on association between echocardiographic findings in COPD patients with severity of COPD. Mediscope [Internet]. 2020 May 17 [cited 2024 Nov. 21];7(1):44-50. Available from: https://banglajol.info/index.php/MEDISCOPE/article/view/47139