Study on association between echocardiographic findings in COPD patients with severity of COPD. Mediscope, [S. l.], v. 7, n. 1, p. 44–50, 2020. DOI: 10.3329/mediscope.v7i1.47139. Disponível em: https://www.banglajol.info/index.php/MEDISCOPE/article/view/47139. Acesso em: 28 jun. 2026.