“Mortality Rate During Exacerbation Episodes of Chronic Obstructive Pulmonary Disease (COPD) in Elderly Individuals Hospitalized at a University Institution in the State of Paraná, Brazil”. Research, Society and Development 13, no. 1 (January 26, 2024): e11913144872. Accessed June 28, 2025. https://ojs34.rsdjournal.org/index.php/rsd/article/view/44872.