KUMAR, D. S. S. .; SAVYA, D. . . V. S. . Pulmonary hypertension in chronic lung diseases: a hospital-based cross-sectional observational study using echocardiographic assessment. Student’s Journal of Health Research Africa, Africa, v. 7, n. 3, p. 9, 2026. DOI: 10.51168/sjhrafrica.v7i3.2514. Disponível em: https://sjhresearchafrica.org/index.php/public-html/article/view/2514. Acesso em: 21 may. 2026.