A. P. . Sari, R. Ratnawati, W. . Aniwidyaningsih, S. L. . Andarini, and F. . Yunus, “Neutrophyl – Lymphocyte Ratio (NLR) and C-Reactive Protein (CRP) Levels in Stable and Exacerbated Chronic Obstructive Pulmonary Disease (COPD) Patients in Persahabatan Hospital Jakarta”, Respir Scie, vol. 2, no. 2, pp. 78-91, Feb. 2022.