THE ASSOCIATION BETWEEN TYPE 2 DIABETES MELLITUS COMORBIDITY AND THE SEVERITY OF ACUTE EXACERBATIONS IN COPD PATIENTS (2015–2025). VARIABLE RESEARCH JOURNAL, [S. l.], v. 3, n. 03, p. 639–650, 2026. Disponível em: https://variablejournal.my.id/index.php/VRJ/article/view/377.. Acesso em: 19 sep. 2026.